diff --git a/02_MENT/main_02_MENT.cpp b/02_MENT/main_02_MENT.cpp
index 7e56780..e249175 100644
--- a/02_MENT/main_02_MENT.cpp
+++ b/02_MENT/main_02_MENT.cpp
@@ -36,8 +36,9 @@ int hexStringToInt(PascalString binaryDigits) {
 
 void printPascalString(PascalString s) {
     for(int i = 0; i <= s.length; i++) {
-        println(s.characters[i]);
+        print(s.characters[i]);
     }
+    println();
 }
 
 PascalString intToDual(int n) {
@@ -93,25 +94,42 @@ PascalString bitwiseDualAnd(PascalString a, PascalString b) {
 }
 
 PascalString bitwiseHexAnd(PascalString a, PascalString b) {
+    PascalString shortString = a.length < b.length ? a : b;
+    PascalString longString = a.length > b.length ? a : b;
+    PascalString result = {longString.length, '0'};
 
+    for(int i = longString.length; i >= 0; --i) {
+        if(shortString.length < i) result.characters[i] = longString.characters[i];
+        result.characters[i] = longString.characters[i] & shortString.characters[i];
+    }
+
+    return result;
 }
 
 int to_c_string(PascalString s) {
 
 }
 
+void line() {
+println("===================================");
+}
+
 int main(int argc, char** argv, char** envp) {
 
   PascalString s = {3, '1', '0', '0'};
   PascalString s2 = {4, 'f', 'f', 'f', 'f'};
   println(hexStringToInt(s));
+  line();
   println(hexStringToInt(s2));
-
+  line();
   println(hexDigitToInt('d'));
+  line();
   println(hexDigitToInt('9'));
+  line();
   println(hexDigitToInt('2'));
   
   printPascalString(s2);
+  line();
   
   int controlRegister = 128;
   controlRegister |= 64+32;
@@ -120,15 +138,25 @@ int main(int argc, char** argv, char** envp) {
   controlRegister <<= 1;
   
   println(controlRegister);
-  
+  line();
   println(intToHexChar(6));
+  line();
   println(intToHexChar(10));
-  
+  line();
   printPascalString(intToDual(4106));
+  line();
   printPascalString(intToHex(965));
+  line();
   printPascalString(intToHex(1956));
-  
+
+  line();
   printPascalString(bitwiseDualAnd({3, '1', '1', '0'}, {4, '1', '1', '1', '0'}));
+  line();
+  printPascalString(bitwiseDualAnd({3, '1', '1', '1'}, {4, '1', '1', '1', '0'}));
+  line();
+  printPascalString(bitwiseDualAnd({3, '1', '1', '0'}, {4, '1', '1', '1', '1'}));
+  line();
+  printPascalString(bitwiseDualAnd({3, '0', '1', '0'}, {4, '1', '0', '1', '1'}));
   
   return 0;
 }