N = int(raw_input())
ans = [0] * 10
for i in range(N):
    r = raw_input().split()
    s = [int(x) for x in r[:4]]
    if r[4] == "NO":
        ans[s[0]] = -1
        ans[s[1]] = -1
        ans[s[2]] = -1
        ans[s[3]] = -1
    elif r[4] == "YES":
        ans[s[0]] += 1
        ans[s[1]] += 1
        ans[s[2]] += 1
        ans[s[3]] += 1
print ans.index(max(ans))