#include <stdio.h>
#include <stdlib.h>

#define YES 'Y'
#define NO 'N'

int main(void)
{
	char n,i,a[9],b[9],c[9],d[9],r[9][4],rr[9],arr[10]={},max,maxN;
	scanf("%hhd",&n);
	for (i=0;i<n;i++) {
		scanf("%hhd %hhd %hhd %hhd %s",&a[i],&b[i],&c[i],&d[i],r[i]);
		rr[i] = (r[i][0]==YES)?1:0;
	}
	
	for (i=0;i<n;i++) {
		if (rr[i]==0) {
			arr[a[i]] = -99;
			arr[b[i]] = -99;
			arr[c[i]] = -99;
			arr[d[i]] = -99;
		} else {
			arr[a[i]]++;
			arr[b[i]]++;
			arr[c[i]]++;
			arr[d[i]]++;
		}
	}
	max = -100;
	maxN = -1;
	for (i=0;i<10;i++) {
		if (max < arr[i]) {
			max = arr[i];
			maxN = i;
		}
	}

	printf("%hhd\n",maxN);

	return 0;
}