#include <stdio.h>

int main(void)
{
	int n;
	int ary[6][10] = {0};
	int abcd[6][4] = {0};
	int total[10] = {0};
	int max = -100;
	int max_no = 0;
	char r[6][4];

	int i, j;

	scanf("%d", &n);

	for (i = 0; i < n; i++) {
		for (j = 0; j < 4; j++) {
			scanf("%d", &abcd[i][j]);
		}
		scanf("%s", &r[i][0]);
	}
	
	for (i = 0; i < n; i++) {
		for (j = 0; j < 4; j++) {
			if (r[i][0] == 'Y')
				ary[i][abcd[i][j]] = 1;
			else
				ary[i][abcd[i][j]] = -10; 
		}
	}
	
	for (i = 0; i < n; i++) {
		for (j = 0; j < 10; j++) {
			total[j] += ary[i][j];
		}
	}

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

	printf("%d\n", max_no);
	
	return 0;
}