1 files changed, 4 insertions, 5 deletions

diff --git a/12/main.y b/12/main.y
index 5431c55..319b2d9 100644
--- a/12/main.y
+++ b/12/main.y
@@ -58,8 +58,8 @@ boolean_expr: unary_expr LT unary_expr
             | unary_expr NEQ unary_expr
             ;
 
-assignment_expr: unary_expr ASSIGN unary_expr
-               | unary_expr ASSIGN boolean_expr
+assignment_expr: argument ASSIGN unary_expr
+               | argument ASSIGN boolean_expr
                ;
 
 expression: unary_expr
@@ -67,12 +67,11 @@ expression: unary_expr
           | assignment_expr
           ;
 
-for_expr: FOR LPAREN statement statement expression RPAREN statement
-        | FOR LPAREN statement statement RPAREN statement
+for_expr: FOR LPAREN statement statement expression RPAREN block
+        | FOR LPAREN statement statement RPAREN block
         ;
 
 while_expr: WHILE LPAREN expression RPAREN block
-          | WHILE LPAREN RPAREN block
           ;
 
 if_expr: IF LPAREN expression RPAREN block