diff --git a/02_MENT/main_02_MENT.cpp b/02_MENT/main_02_MENT.cpp
index 4844b36..f95e158 100644
--- a/02_MENT/main_02_MENT.cpp
+++ b/02_MENT/main_02_MENT.cpp
@@ -96,8 +96,8 @@ PascalString bitwiseDualAnd(PascalString a, PascalString b) {
 PascalString bitwiseHexAnd(PascalString a, PascalString b) {
     PascalString result = {a.length, '0'};
 
-    for(int i = a.length; i >= 0; --i) {
-        if(b.length < i) result.characters[i] = a.characters[i];
+    for(int i = b.length; i >= 0; --i) {
+        if(a.length < i) result.characters[i] = a.characters[i];
         result.characters[i] = a.characters[i] & b.characters[i];
     }