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

int main(){
    int N, i, j, cnt_y = 0, cnt_n = 0, num[6][4];
    char str[6][4];
    int YES[11] = {0}, NO[11] = {0};

    scanf("%d\n", &N);
    for(i = 0; i < N; i++){
        scanf("%d %d %d %d %s\n", &num[i][0], &num[i][1], &num[i][2], &num[i][3], str[i]);
    }
    for(i = 0; i < N; i++){
        for(j = 0; j < 4; j++){
            if(strcmp(str[i], "YES") == 0){
                YES[num[i][j]]++;
            }else if(strcmp(str[i], "NO") == 0){
                NO[num[i][j]]++;
            }
        }
        if(strcmp(str[i], "YES") == 0)  cnt_y++;
        if(strcmp(str[i], "NO") == 0)  cnt_n++;
    }
    //printf("cnt_y %d cnt_no %d\n", cnt_y, cnt_n);
    for(i = 1; i <= 9; i++){
        if(YES[i] == cnt_y && NO[i] == 0){
            printf("%d\n", i);
        }
    }
    return 0;
}