numbers = [0 for i in range(10)]
N = input()
for i in range(N):
	abcdr = raw_input().split(' ')
	if abcdr[4] == 'YES':
		for j in map(int,abcdr[:4]):
			if numbers[j] != -1:
				numbers[j] += 1
	else:
		for j in map(int,abcdr[:4]):
			numbers[j] = -1
print numbers.index(max(numbers))