N = gets.to_i three = 'd'.ord - 'a'.ord five = 'f'.ord - 'a'.ord fifteen = 'p'.ord - 'a'.ord N.times do |i| i = i.succ if i % fifteen == 0 puts 'FizzBuzz' elsif i % five == 0 puts 'Buzz' elsif i % three == 0 puts 'Fizz' else puts i end end