#include <bits/stdc++.h>

 using namespace std;

 char ans[][];

 void fillin(int x, int y, char c, int maxy, int cnt)

 {

     int a = x, b = y;

     while (cnt)

     {

         ans[a][b] = c;

         if (b +  >= maxy) { a += ; b = y; }

         else b += ;

         cnt--;

     }

 }

 int main()

 {

     int a, b, c, d;

     while (cin >> a >> b >> c >> d)

     {

         for (int i = ; i < ; i++)

         {

             for (int j = ; j < ; j++)

             {

                 ans[i][j] = 'A';

                 ans[i][j + ] = 'B';

                 ans[i + ][j] = 'C';

                 ans[i + ][j + ] = 'D';

             }

         }

         fillin(, , 'B', , b - );

         fillin(, , 'C', , c - );

         fillin(, , 'D', , d - );

         fillin(, , 'A', , a - );

         cout << "50 50" << endl;

         for (int i = ; i < ; i++)

         {

             for (int j = ; j < ; j++)

                 cout << ans[i][j];

             cout << endl;

         }

     }

     return ;

 }