possible_numbers = (0..9).to_a
gets.to_i.times do |i|
  array = gets.chomp.split.map { |val| val =~ /\d/ ? val.to_i : val }
  case array[4]
  when 'YES'
    possible_numbers &= array
  when 'NO'
    possible_numbers -= array
  end
end
puts possible_numbers