#include <bits/stdc++.h>
using namespace std;
template <typename Q>
void inin(Q &x) {
  x = 0;
  int f = 0;
  char ch = getchar();
  while (ch < '0' || ch > '9') {
    if (ch == '-') f = 1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') x = x * 10 + ch - '0', ch = getchar();
  x = f ? -x : x;
}
int a[5];
char ans[55][55];
int main() {
  for (int i = (1); i <= (4); i++) inin(a[i]), a[i]--;
  for (int i = (1); i <= (12); i++)
    for (int j = (1); j <= (50); j++) ans[i][j] = 'A';
  for (int i = (1); i <= (11); i++)
    for (int j = (2); j <= (50); j++) {
      if (!a[2]) break;
      if (ans[i - 1][j] != 'B' && ans[i][j - 1] != 'B' &&
          ans[i - 1][j - 1] != 'B')
        ans[i][j] = 'B', a[2]--;
    }
  for (int i = (13); i <= (25); i++)
    for (int j = (1); j <= (50); j++) ans[i][j] = 'B';
  for (int i = (14); i <= (24); i++)
    for (int j = (2); j <= (50); j++) {
      if (!a[1]) break;
      if (ans[i - 1][j] != 'A' && ans[i][j - 1] != 'A' &&
          ans[i - 1][j - 1] != 'A')
        ans[i][j] = 'A', a[1]--;
    }
  for (int i = (26); i <= (38); i++)
    for (int j = (1); j <= (50); j++) ans[i][j] = 'C';
  for (int i = (27); i <= (37); i++)
    for (int j = (2); j <= (50); j++) {
      if (!a[4]) break;
      if (ans[i - 1][j] != 'D' && ans[i][j - 1] != 'D' &&
          ans[i - 1][j - 1] != 'D')
        ans[i][j] = 'D', a[4]--;
    }
  for (int i = (39); i <= (50); i++)
    for (int j = (1); j <= (50); j++) ans[i][j] = 'D';
  for (int i = (40); i <= (50); i++)
    for (int j = (2); j <= (50); j++) {
      if (!a[3]) break;
      if (ans[i - 1][j] != 'C' && ans[i][j - 1] != 'C' &&
          ans[i - 1][j - 1] != 'C')
        ans[i][j] = 'C', a[3]--;
    }
  printf("50 50\n");
  for (int i = (1); i <= (50); i++) printf("%s\n", ans[i] + 1);
  return 0;
}
