#include <stdio.h>
#include <string.h>

int main(void) {
    int i, j, n, max, pos;
    int d[4], yes[10], no[10];
    char b[4];

    scanf("%d", &n);
    for (i = 0; i < n; i++) {
        for (j = 0; j < 4; j++)
            scanf("%d", &d[j]);
        scanf("%s", b);

        if (strcmp(b, "YES") == 0)
            for (j = 0; j < 4; j++)
                yes[d[j]]++;
        else
            for (j = 0; j < 4; j++)
                no[d[j]]++;
    }

    for (i = 0; i < 10; i++)
        if (no[i] > 0)
            yes[i] =0;

    max = 0;
    for (i = 0; i < 10; i++)
        if (max < yes[i]) {
            max = yes[i];
            pos = i;
        }

    printf("%d\n", pos);

    return 0;
}