#load("std.grr")

def fizzbuzz? { [3 % 0 =] [5 % 0 =] bi or }
def fizz { when: 3 % 0 = ["Fizz" type]; }
def buzz { when: 5 % 0 = ["Buzz" type]; }

def fizzbuzz1 {
  if: fizzbuzz?
    [ [fizz] keep buzz "\n" type ]
    [ . ];
}

def fizzbuzz {
  0 swap times:
    [ 1 + dup [fizzbuzz1] keep ];
  drop
}

30 fizzbuzz