num = [1] * 10

n = int(input())
for _ in range(n):
    temp = input().split()
    a = list(map(int, temp[:4]))
    
    for i in a:
        if temp[4] == "YES" and num[i] >= 1:
            num[i] += 1
        else:
            num[i] = 0
            
print(num.index(max(num)))