def plural(n, form1, form2, form3):
    plural = 1 if n % 10 == 1 and n % 100 != 11 else 2 if n % 10 >= 2 and n % 10 <= 4 and n % 100 < 10 or n % 100 >= 20 else 3

    return {
        1: str(n) + ' ' + form1,
        2: str(n) + ' ' + form2,
        3: str(n) + ' ' + form3
    }[plural]