#include <bits/stdc++.h>
int main(void) {
  int cards[4][13] = {{0}, {0}};
  int j, n;
  char i;
  scanf("%d", &n);
  printf("%d\n", n);
  for (i = 0; i < n; i++) {
    char b;
    int c;
    scanf("%c %d\n", &b, &c);
    if (b == 'S') {
      cards[0][c] = 1;
    } else if (b == 'H') {
      cards[1][c] = 1;
    } else if (b == 'C') {
      cards[2][c] = 1;
    } else if (b == 'D') {
      cards[3][c] = 1;
    }
  }
  char pattern[] = {'S', 'H', 'C', 'D'};
  for (i = 0; i < 4; i++) {
    for (j = 1; j <= 13; j++) {
      if (cards[i][j] == 0) {
        printf("%c %d\n", pattern[i], j);
      }
    }
  }
  return 0;
}
