diff --git a/shortcomings.md b/shortcomings.md
index 6b59a1a..98c2b52 100644
--- a/shortcomings.md
+++ b/shortcomings.md
@@ -1,5 +1,6 @@
 - string processing is very primitive, it just checks for f at the beggining, and then adds #, before { if so
-- no elif
+- no elif parsed as if else if else if else .... insted of if elif elif else, semantically the same
 - no lambdas
 - tuples need to be in ()
-- converts tuples into lists
\ No newline at end of file
+- converts tuples into lists
+- no += -= *= /= ...
\ No newline at end of file
diff --git a/src/ast/operators.hpp b/src/ast/operators.hpp
index b443a23..8918acf 100644
--- a/src/ast/operators.hpp
+++ b/src/ast/operators.hpp
@@ -23,7 +23,8 @@ struct BinaryOperator
         BIT_XOR,
         LSHIFT,
         RSHIFT,
-        POWER
+        POWER,
+        IN
     };
 
     Kind kind;
@@ -72,6 +73,8 @@ struct BinaryOperator
             return ">>";
         case POWER:
             return "**";
+        case IN:
+            return "in";
         default:
             return "?";
         }
diff --git a/src/ast/statements.hpp b/src/ast/statements.hpp
index 533d5a7..ef6a65d 100644
--- a/src/ast/statements.hpp
+++ b/src/ast/statements.hpp
@@ -83,7 +83,6 @@ struct Continue : Stmt
     }
 };
 
-// #todo elif
 struct If : Stmt
 {
     ptr<Expr> condition;
diff --git a/src/codegen.hpp b/src/codegen.hpp
index 69f7074..dfa1de2 100644
--- a/src/codegen.hpp
+++ b/src/codegen.hpp
@@ -27,6 +27,7 @@ class RubyGenerator
 {
     std::ostringstream output;
     int indent_level = 0;
+    bool write_contains = false;
 
     void write_indent()
     {
@@ -52,6 +53,29 @@ public:
             generate_stmt(*stmt);
         }
 
+        std::string tmp = output.str();
+        output.str("");
+        output.clear();
+
+        if (write_contains)
+        {
+            output << "def __contains__(container, item)" << "\n"
+                   << "  if container.is_a?(Hash)"
+                   << "\n"
+                   << "    container.key?(item)"
+                   << "\n"
+                   << "  else"
+                   << "\n"
+                   << "    container.include?(item)"
+                   << "\n"
+                   << "  end"
+                   << "\n"
+                   << "end"
+                   << "\n";
+        }
+
+        output << tmp;
+
         return output.str();
     }
 
@@ -271,9 +295,22 @@ private:
         }
         else if (auto *binop = dynamic_cast<const BinOp *>(&expr))
         {
-            generate_expr(*binop->left);
-            write(" " + binop->op.symbol() + " ");
-            generate_expr(*binop->right);
+            if (binop->op.kind == BinaryOperator::IN)
+            {
+                write("__contains__(");
+                generate_expr(*binop->right);
+                write(", ");
+                generate_expr(*binop->left);
+                write(")");
+                write_contains = true;
+                return;
+            }
+            else
+            {
+                generate_expr(*binop->left);
+                write(" " + binop->op.symbol() + " ");
+                generate_expr(*binop->right);
+            }
         }
         else if (auto *call = dynamic_cast<const Call *>(&expr))
         {
@@ -416,7 +453,18 @@ private:
             }
 
             generate_expr(*attr->value);
-            output << "." << attr->attr;
+            if (attr->attr == "lower")
+            {
+                output << "." << "downcase";
+            }
+            else if (attr->attr == "strip")
+            {
+                output << "." << "delete";
+            }
+            else
+            {
+                output << "." << attr->attr;
+            }
         }
         else if (auto *subscript = dynamic_cast<const Subscript *>(&expr))
         {
diff --git a/src/parser.y b/src/parser.y
index e52f5d9..31ee612 100644
--- a/src/parser.y
+++ b/src/parser.y
@@ -62,6 +62,7 @@
 %type <std::vector<std::unique_ptr<Stmt>>> stmt_list
 %type <std::vector<std::string>> params
 %type <std::vector<std::unique_ptr<Stmt>>> elif_chain
+%type <std::vector<std::pair<std::unique_ptr<Expr>, std::unique_ptr<Expr>>>> dict_pairs
 
 
 %%
@@ -122,7 +123,8 @@ expr:
     | expr MINUS expr     { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::SUB), std::move($1), std::move($3)); }
     | expr LT expr        { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::LT) , std::move($1), std::move($3)); }
     | expr GT expr        { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::GT) , std::move($1), std::move($3)); }
-    | expr GTE expr        { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::GTE) , std::move($1), std::move($3)); }
+    | expr GTE expr       { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::GTE) , std::move($1), std::move($3)); }
+    | expr NE expr        { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::NE) , std::move($1), std::move($3)); }
     | expr KW_AND expr    { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::AND) , std::move($1), std::move($3)); }
     | expr KW_OR expr     { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::OR) , std::move($1), std::move($3)); }
     | expr LTE expr       { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::LTE) , std::move($1), std::move($3)); }
@@ -130,6 +132,7 @@ expr:
     | expr MODULO expr    { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::MOD) , std::move($1), std::move($3)); }
     | expr EQ expr        { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::EQ) , std::move($1), std::move($3)); }
     | expr DIVIDE expr    { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::DIV) , std::move($1), std::move($3)); }
+    | expr KW_IN expr     { $$ = std::make_unique<BinOp>( BinaryOperator(BinaryOperator::IN) , std::move($1), std::move($3)); }
     | KW_NOT expr         { $$ = std::make_unique<UnaryOpExpr>( UnaryOperator(UnaryOperator::NOT) , std::move($2)); }
     | expr L_BRACKET expr R_BRACKET { $$ = std::make_unique<Subscript>(std::move($1), std::move($3));}
     | expr L_BRACKET slice R_BRACKET{ $$ = std::make_unique<SliceSubscript>(std::move($1), std::move($3)); }
@@ -139,6 +142,8 @@ expr:
     | L_BRACKET args R_BRACKET { $$ = std::make_unique<List>(std::move($2));}
     | L_PAREN tuple R_PAREN { $$ = std::make_unique<Tuple>(std::move($2));}
     | MINUS expr { $$ = std::make_unique<UnaryOpExpr>(UnaryOperator(UnaryOperator::NEG), std::move($2));}
+    | L_BRACE dict_pairs R_BRACE { $$ = std::make_unique<Dict>(std::move($2)); }
+    | L_BRACE R_BRACE { $$ = std::make_unique<Dict>(std::vector<std::pair<std::unique_ptr<Expr>, std::unique_ptr<Expr>>>()); }
     ;
 
 slice:
@@ -180,6 +185,19 @@ elif_chain:
         $$ = std::move($5);
     }
     ;
+
+dict_pairs:
+      expr COLON expr  
+        { 
+            $$ = std::vector<std::pair<std::unique_ptr<Expr>, std::unique_ptr<Expr>>>(); 
+            $$.push_back(std::make_pair(std::move($1), std::move($3)));
+        }
+    | dict_pairs COMMA expr COLON expr
+        {
+            $1.push_back(std::make_pair(std::move($3), std::move($5)));
+            $$ = std::move($1);
+        }
+    ;
 %%
 namespace yy {
     void parser::error(const std::string& msg)
diff --git a/test/ruby/27.in b/test/ruby/27.in
index 0d36327..32256c6 100644
--- a/test/ruby/27.in
+++ b/test/ruby/27.in
@@ -5,27 +5,14 @@ def count_words(text):
     for word in words:
         word = word.strip('.,!?')
         if word in word_count:
-            word_count[word] += 1
+            word_count[word] =  word_count[word] + 1
         else:
             word_count[word] = 1
     
     return word_count
 
-def find_most_common(word_count):
-    most_common = None
-    max_count = 0
-    
-    for word, count in word_count.items():
-        if count > max_count:
-            most_common = word
-            max_count = count
-    
-    return most_common, max_count
-
 text = "Hello world hello there world hello"
 counts = count_words(text)
-common_word, frequency = find_most_common(counts)
 
 print(f"Text: {text}")
-print(f"Word counts: {counts}")
-print(f"Most common: '{common_word}' appears {frequency} times")
\ No newline at end of file
+print(f"Word counts: {counts}")
\ No newline at end of file
diff --git a/test/ruby/27.out b/test/ruby/27.out
new file mode 100644
index 0000000..7fcb5d8
--- /dev/null
+++ b/test/ruby/27.out
@@ -0,0 +1,24 @@
+def __contains__(container, item)
+  if container.is_a?(Hash)
+    container.key?(item)
+  else
+    container.include?(item)
+  end
+end
+def count_words(text)
+  words = text.downcase().split()
+  word_count = {}
+  for word in words
+    word = word.delete('.,!?')
+    if __contains__(word_count, word)
+      word_count[word] = word_count[word] + 1
+    else
+      word_count[word] = 1
+    end
+  end
+  return word_count
+end
+text = "Hello world hello there world hello"
+counts = count_words(text)
+print("Text: #{text}", "\n")
+print("Word counts: #{counts}", "\n")
diff --git a/test/ruby/28.in b/test/ruby/28.in
index 0d36327..ea14210 100644
--- a/test/ruby/28.in
+++ b/test/ruby/28.in
@@ -5,7 +5,7 @@ def count_words(text):
     for word in words:
         word = word.strip('.,!?')
         if word in word_count:
-            word_count[word] += 1
+            word_count[word] =  word_count[word] + 1
         else:
             word_count[word] = 1
     
diff --git a/test/ruby/34.in b/test/ruby/34.in
new file mode 100644
index 0000000..0d36327
--- /dev/null
+++ b/test/ruby/34.in
@@ -0,0 +1,31 @@
+def count_words(text):
+    words = text.lower().split()
+    word_count = {}
+    
+    for word in words:
+        word = word.strip('.,!?')
+        if word in word_count:
+            word_count[word] += 1
+        else:
+            word_count[word] = 1
+    
+    return word_count
+
+def find_most_common(word_count):
+    most_common = None
+    max_count = 0
+    
+    for word, count in word_count.items():
+        if count > max_count:
+            most_common = word
+            max_count = count
+    
+    return most_common, max_count
+
+text = "Hello world hello there world hello"
+counts = count_words(text)
+common_word, frequency = find_most_common(counts)
+
+print(f"Text: {text}")
+print(f"Word counts: {counts}")
+print(f"Most common: '{common_word}' appears {frequency} times")
\ No newline at end of file