#!/usr/bin/env ruby
def isfizz(n)
  case n
  when 3
    'Fizz'
  when 1,2
    ''
  else
    isfizz(n-3)
  end
end
def isbuzz(n)
  case n
  when 5
    'Buzz'
  when 1,2,3,4
    ''
  else
    isbuzz(n-5)
  end
end

def fizzbuzz(n)
  fb = isfizz(n)+isbuzz(n)
  fb>'' ? fb : n.to_s
end

for i in 1..50
  printf("%s\n", fizzbuzz(i))
end