#include <bits/stdc++.h>   using namespace std;   int main() {     int A[2], B[2], C[2];     scanf( %d %d %d %d %d %d , &A[0], &A[1], &B[0], &B[1], &C[0], &C[1]);     int r1 = A[0];     int r2 = B[0];     int r3 = C[0];     int c1 = A[1];     int c2 = B[1];     int c3 = C[1];     bool check = false;     int row1, row2, row3, col1, col2, col3;     for (int i = 0; i < (1 << 3); i++) {       A[0] = r1;       B[0] = r2;       C[0] = r3;       A[1] = c1;       B[1] = c2;       C[1] = c3;       if ((i & 1) == 1) {         swap(A[0], A[1]);       }       if (((i >> 1) & 1) == 1) {         swap(B[0], B[1]);       }       if (((i >> 2) & 1) == 1) {         swap(C[0], C[1]);       }       if (A[0] == B[0] && B[0] == C[0] && A[0] == A[1] + B[1] + C[1]) {         row1 = A[1];         row2 = B[1];         row3 = C[1];         col1 = A[0];         printf( %d n , col1);         for (int i = 0; i < row1; i++) {           for (int j = 0; j < col1; j++) {             printf( A );           }           printf(  n );         }         for (int i = 0; i < row2; i++) {           for (int j = 0; j < col1; j++) {             printf( B );           }           printf(  n );         }         for (int i = 0; i < row3; i++) {           for (int j = 0; j < col1; j++) {             printf( C );           }           printf(  n );         }         return 0;       }       if (A[0] == B[0] + C[0] && B[1] == C[1] && A[0] == A[1] + B[1]) {         row1 = A[1];         row2 = B[1];         col1 = A[0];         col2 = B[0];         col3 = C[0];         printf( %d n , col1);         for (int i = 0; i < row1; i++) {           for (int j = 0; j < col1; j++) {             printf( A );           }           printf(  n );         }         for (int i = 0; i < row2; i++) {           for (int j = 0; j < col2; j++) {             printf( B );           }           for (int j = 0; j < col3; j++) {             printf( C );           }           printf(  n );         }         return 0;       }       if (B[0] == A[0] + C[0] && A[1] == C[1] && B[0] == B[1] + C[1]) {         row1 = B[1];         row2 = A[1];         col1 = B[0];         col2 = A[0];         col3 = C[0];         printf( %d n , col1);         for (int i = 0; i < row1; i++) {           for (int j = 0; j < col1; j++) {             printf( B );           }           printf(  n );         }         for (int i = 0; i < row2; i++) {           for (int j = 0; j < col2; j++) {             printf( A );           }           for (int j = 0; j < col3; j++) {             printf( C );           }           printf(  n );         }         return 0;       }       if (C[0] == A[0] + B[0] && A[1] == B[1] && C[0] == A[1] + C[1]) {         row1 = C[1];         row2 = A[1];         col1 = C[0];         col2 = A[0];         col3 = B[0];         printf( %d n , col1);         for (int i = 0; i < row1; i++) {           for (int j = 0; j < col1; j++) {             printf( C );           }           printf(  n );         }         for (int i = 0; i < row2; i++) {           for (int j = 0; j < col2; j++) {             printf( A );           }           for (int j = 0; j < col3; j++) {             printf( B );           }           printf(  n );         }         return 0;       }     }     if (!check) {       printf( -1 );       return 0;     }   }