# 入力された値を文字列で受け取る
str = gets.chomp

month = str.to_i

if [3, 4, 5].include? month
  puts "spring"
elsif [6, 7, 8].include? month
  puts "summer"
elsif [9, 10, 11].include? month
  puts "fall"
elsif [12, 1, 2].include? month
  puts "winter"
end