box = set()
for i in range(10):
    box.add(i)
YES = [0]*10
cnt=0
N = int(input())
for i in range(N):
    A,B,C,D,R = map(str,input().split())
    if R=="NO":
        if int(A) in box:
            box.remove(int(A))
        if int(B) in box:
            box.remove(int(B))
        if int(C) in box:
            box.remove(int(C))
        if int(D) in box:
            box.remove(int(D))
    else:
        cnt+=1
        YES[int(A)]+=1
        YES[int(B)]+=1
        YES[int(C)]+=1
        YES[int(D)]+=1

for y in range(10):
    if YES[y]<cnt:
        if y in box:
            box.remove(y)

print(*box)