func_code_string: #include <bits/stdc++.h>   using namespace std;   int v[7], x[7];   int main() {     for (int i = 0; i < 6; ++i) scanf( %d , &v[i]);     int ans = -1;     for (int i = 0; i <= 100000; ++i) {       x[1] = v[1] - v[2] + v[3] - v[4] + 2 * i;       if (x[1] % 2 || x[1] < 0) continue;       x[2] = v[2] + v[4] - v[0] - 2 * i;       if (x[2] % 2 || x[2] < 0) continue;       x[3] = v[0] - v[2] - v[5] + v[3] + 2 * i;       if (x[3] % 2 || x[3] < 0) continue;       x[4] = v[2] + v[5] - v[1] - 2 * i;       if (x[4] % 2 || x[4] < 0) continue;       x[5] = v[4] + v[5] - v[3] - 2 * i;       if (x[5] % 2 || x[5] < 0) continue;       x[6] = v[0] - v[5] + v[1] - v[4] + 2 * i;       if (x[6] % 2 || x[6] < 0) continue;       ans = i;       break;     }     if (ans != -1) {       x[0] = ans;       int res = ans;       for (int i = 1; i <= 6; ++i) {         x[i] /= 2;         res += x[i];       }       printf( %d n , res);       for (int i = 0; i < res; ++i) printf( a );       printf(  n );       for (int i = 0; i < x[0] + x[1] + x[2]; ++i) printf( a );       for (int i = 0; i < x[3] + x[4] + x[5] + x[6]; ++i) printf( b );       printf(  n );       for (int i = 0; i < x[0]; ++i) printf( a );       for (int i = 0; i < x[1] + x[2]; ++i) printf( b );       for (int i = 0; i < x[3] + x[4]; ++i) printf( a );       for (int i = 0; i < x[5] + x[6]; ++i) printf( b );       printf(  n );       for (int i = 0; i < x[0]; ++i) printf( b );       for (int i = 0; i < x[1]; ++i) printf( a );       for (int i = 0; i < x[2]; ++i) printf( b );       for (int i = 0; i < x[3]; ++i) printf( a );       for (int i = 0; i < x[4]; ++i) printf( b );       for (int i = 0; i < x[5]; ++i) printf( a );       for (int i = 0; i < x[6]; ++i) printf( b );       printf(  n );     } else {       printf( -1 n );     }     return 0;   }   