n=int(input())
v=[0 for i in range(10)]
for i in range(n):
    a,b,c,d,r = input().split()
    a,b,c,d = map(int, (a,b,c,d))
    if r == "YES":
        for x in (a,b,c,d):
            v[x] += 1
    else:
        for x in (a,b,c,d):
            v[x] -= 1
print(list(sorted(zip(v, range(10))))[-1][1])