f = input()
N = int(f)
s = set()
for v in range(0, 10):
    s.add(str(v))
b = s
for i in range(1, N + 1):
    f = input()
    s_f = f.split()
    ans = s_f[4]
    set_s_f = set(s_f)
    if ans == 'YES':
        b = b & set_s_f
    else:
        b = b - set_s_f
for v in b:
    v = int(v)
    print(v)