#include <stdio.h>
int main(){
    //input
    int N;
    scanf("%d",&N);

    int count[10];
    for (int i = 0;i < 10;i++){
        count[i] = 0;
    }

    for (int i = 0;i < N;i++){
        int A,B,C,D;
        char R[4];
        scanf("%d %d %d %d %s",&A,&B,&C,&D,R);
        if (R[0] == 'Y'){
            count[A]++;
            count[B]++;
            count[C]++;
            count[D]++;
        }else{
            count[A]--;
            count[B]--;
            count[C]--;
            count[D]--;
        }
    }

    //ouput
    int answer = -1;
    int maximum = -1;
    for (int i = 0;i < 10;i++){
        if (count[i] > maximum){
            answer = i;
            maximum = count[i];
        }
    }
    printf("%d\n",answer);

    return 0;
}