diff --git a/02_MENT/Testat/build.sh b/02_MENT/Testat/build.sh
index 7efe4e7..9cb70b2 100755
--- a/02_MENT/Testat/build.sh
+++ b/02_MENT/Testat/build.sh
@@ -2,9 +2,6 @@
 
 rm *.out
 
-clang++-6.0 -std=c++14 -I../helpers/  -o limits.out limits_println.cpp 
-clang++-6.0 -std=c++14 -I../helpers/  -o println.out printlnDemo.cpp 
-
 clang++-6.0 -std=c++14 main_02_MENT.cpp
 
 ./a.out
diff --git a/02_MENT/a.out b/02_MENT/a.out
deleted file mode 100755
index b8a6f54..0000000
Binary files a/02_MENT/a.out and /dev/null differ
diff --git a/02_MENT/limits.out b/02_MENT/limits.out
deleted file mode 100755
index 080e0a5..0000000
Binary files a/02_MENT/limits.out and /dev/null differ
diff --git a/02_MENT/main_02_MENT.cpp b/02_MENT/main_02_MENT.cpp
index 120d199..7e56780 100644
--- a/02_MENT/main_02_MENT.cpp
+++ b/02_MENT/main_02_MENT.cpp
@@ -10,6 +10,8 @@ struct PascalString{
 	char characters[256];  // chars of some character string
 };
 
+char cStringArea[1024];
+
 int hexDigitToInt(char hexDigit) {
 int value = 0;
 
@@ -53,12 +55,12 @@ PascalString intToDual(int n) {
 char intToHexChar(int n) {
     if(n > 9) {
         switch(n) {
-            case 10: return 'A'; break;
-            case 11: return 'B'; break;
-            case 12: return 'C'; break;
-            case 13: return 'D'; break;
-            case 14: return 'E'; break;
-            case 15: return 'F'; break;
+            case 10: return 'A';
+            case 11: return 'B';
+            case 12: return 'C';
+            case 13: return 'D';
+            case 14: return 'E';
+            case 15: return 'F';
             default: return 'X';
         }
     }
@@ -83,13 +85,21 @@ PascalString bitwiseDualAnd(PascalString a, PascalString b) {
     PascalString result = {longString.length, '0'};
     
     for(int i = longString.length; i >= 0; --i) {
-        if(shortString.characters[i] == '1' && longString.characters[i] == '1') result.characters[i] = '1';
-        else result.characters[i] = '0';
+        if(shortString.length < i) result.characters[i] = longString.characters[i];
+        result.characters[i] = longString.characters[i] & shortString.characters[i];
     }
     
     return result;
 }
 
+PascalString bitwiseHexAnd(PascalString a, PascalString b) {
+
+}
+
+int to_c_string(PascalString s) {
+
+}
+
 int main(int argc, char** argv, char** envp) {
 
   PascalString s = {3, '1', '0', '0'};
diff --git a/02_MENT/println.out b/02_MENT/println.out
deleted file mode 100755
index 8c522bc..0000000
Binary files a/02_MENT/println.out and /dev/null differ