2019#Q

import numpy as np
import random

filename = 'a_example.txt'
f = open(filename, 'r')
N = int(f.readline())
isVert = np.full(N, False)
tags = np.full(N, set())
for n in range(N):
    s = f.readline().split()
    if s[0] == 'V':
        isVert[n] = True
    tags[n] = set(s[2:])