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#include<stdio.h>
 
int main()
{
    int n;
    scanf("%d", &n);
    int i, rank;
    char sym;
    int card[4][14] = {0};
    for (i = 1; i <= n; i++)
    {
        scanf(" %c %d\n", &sym, &rank);
        switch (sym)
        {
        case 'S':
            card[0][rank-1] = -1;
            break;
        case 'H':
            card[1][rank-1] = -1;
            break;
        case 'C':
            card[2][rank-1] = -1;
            break;
        case 'D':
            card[3][rank-1] = -1;
        }