#include <bits/stdc++.h>
int const MAX = 1e5 + 5;
using namespace std;
char ans[50][50];
void place(long long s, long long e, long long c, long long cnt) {
  int f = 0;
  for (long long i = s; i < e; i += 2) {
    for (long long j = 0; j < 50; j += 2) {
      if (cnt == 0) {
        f = 1;
        break;
      }
      ans[i][j] = c;
      cnt--;
    }
    if (f == 1) break;
  }
  return;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long a, b, c, d;
  cin >> a >> b >> c >> d;
  a--, b--, c--, d--;
  for (long long i = 0; i < 10; i++)
    for (long long j = 0; j < 50; j++) ans[i][j] = 'A';
  for (long long i = 10; i < 20; i++)
    for (long long j = 0; j < 50; j++) ans[i][j] = 'B';
  for (long long i = 20; i < 30; i++)
    for (long long j = 0; j < 50; j++) ans[i][j] = 'C';
  for (long long i = 30; i < 50; i++)
    for (long long j = 0; j < 50; j++) ans[i][j] = 'D';
  cout << 50 << " " << 50 << endl;
  place(1, 10, 'B', b);
  place(11, 20, 'A', a);
  place(21, 30, 'D', d);
  place(31, 50, 'C', c);
  for (long long i = 0; i < 50; i++) {
    for (long long j = 0; j < 50; j++) cout << ans[i][j];
    cout << endl;
  }
}
