num = int(input())
ans =[0] * 10
for i in range(num):
    data = input().split(' ')
    if data[4] == "YES":
        for i in range(4):
            ans[int(data[i])] += 1
    else:
        for i in range(4):
            ans[int(data[i])] += -1
print(ans.index(max(ans)))