n = int(input())
c = [True] * 10
for i in range(n):
    a = list(map(str,input().split()))
    if a[4] == 'NO':
        for j in range(4):
            c[int(a[j])] = False
    else:
        for j in range(10):
            if str(j) not in a:
                c[j] = False

for i in range(10):
    if c[i]:print(i)