diff --git a/a2/program.c b/a2/program.c
index 495b26a..46bcc37 100644
--- a/a2/program.c
+++ b/a2/program.c
@@ -19,11 +19,9 @@ void push(char ch){
         exit(0);
 } 
 
-char pop(){
-    if(s.size > 0){
+void pop(){
+    if(s.size >= 0)
         s.size--;
-        return (s.data[s.size]);
-    }
     else 
         exit(0);
 }
@@ -75,19 +73,13 @@ int main(){
     char *b = calloc(l, sizeof(char));
      
     for(i = 0; i < l; i++){
-         //a[i] = gettop();  
-        // b[i] = right_pair(a[i]);
-  
         if(line[i] == '{' || line[i] == '(' || line[i] == '[' || line[i] == '<'){
             push(line[i]);
             a[j] = gettop();
             b[j] = right_pair(a[j]);
             j++;
-            //printf("%c", b[i]);
         }
         if(line[i] == '}' || line[i] == ')' || line[i] == ']' || line[i] == '>'){   
-            //a[i] = gettop();
-            //b[i] = right_pair(a[i]);
             if(s.size == -1){
                 printf("Unexpected closing bracket %c in %d\n", line[i], i);
                 return 0; 
@@ -100,10 +92,17 @@ int main(){
             else{
                  pop();
             }
-
         }
     }
-    i = 0;
+    int begin = 0;
+    int end = strlen(b);
+    int h;
+    while(begin < end){
+        h = b[begin];
+        b[begin] = b[--end];
+        b[end] = h;
+    }
+
     if(s.size == -1){
         printf("All brackets OK\n");
     }