from collections import Counter

def main():
    N = int(input())
    num = []
    for x in range(N):
        A,B,C,D,R = input().split()
        if R == 'YES':
            num.append(int(A))
            num.append(int(B))
            num.append(int(C))
            num.append(int(D))
    cnt = Counter(num)
    cnt = max([(v,k) for k,v in cnt.items()])[1]
    print(cnt)

if __name__ == '__main__':
    main()