# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N = int(input())
	L = [0] * 10
	for i in range(N):
		A, B, C, D, R = list(input().split())
		MM = [A, B, C, D]
		MM = list(map(int, MM))
		if R == "YES":
			for i in range(10):
				if i in MM:
					L[i] += 1
		else:
			for i in range(10):
				if not i in MM:
					L[i] += 1

	# print(L)
	ans = L.index(max(L))
	print(ans)





if __name__ == '__main__':
	main()