N=int(raw_input())
l=[0]*10
for _ in xrange(N):
  a,b,c,d,r=raw_input().split()
  if r=="NO":
    l[int(a)]=-1
    l[int(b)]=-1
    l[int(c)]=-1
    l[int(d)]=-1
  else:
    dic={}
    dic[int(a)]=True
    dic[int(b)]=True
    dic[int(c)]=True
    dic[int(d)]=True
    for i in xrange(10):
      if i not in dic:
        l[i]=-1
for i in xrange(10):
  if l[i]==0: print i