require 'set'
N=gets.chomp.to_i

setno = Set.new
setyes = Set.new
is_first = true
for num in 1..N
  ts = gets.chomp.split
  if ts[4] == 'NO'
    for i in 0..3
      setno.add(ts[i].to_i)
    end
  else
    if is_first
      setyes = Set.new
      for i in 0..3
        setyes.add(ts[i].to_i)
      end
      is_first = false
    else
      t = Set.new
      for i in 0..3
        t.add(ts[i].to_i)
      end
      setyes = setyes & t
    end
  end
end

if setno.size == 9
  puts (Set[0,1,2,3,4,5,6,7,8,9] - setno).to_a
else
  puts (setyes - setno).to_a
end