import sys

sys.setrecursionlimit(10 ** 8)

input = sys.stdin.readline


def main():
    N = int(input())
    ABCDR = [[x for x in input().split()] for _ in range(N)]

    ans = [0] * 10

    for a, b, c, d, r in ABCDR:
        if r == "NO":
            ans[int(a)] -= 1
            ans[int(b)] -= 1
            ans[int(c)] -= 1
            ans[int(d)] -= 1
        else:
            ans[int(a)] += 1
            ans[int(b)] += 1
            ans[int(c)] += 1
            ans[int(d)] += 1

    print(ans.index(max(ans)))


if __name__ == '__main__':
    main()