def sayDigit(n):
    stringNum = {9:"nine", 8:"eight", 7:"seven", 6:"six", 5:"five", 4:"four", 3:"three", 2:"two", 1:"one", 0:"zero"}
    return stringNum[n]

def sayTeen(n):
    stringTeen = {10:"ten", 11:"eleven", 12:"twelve", 13:"thirteen", 14:"fourteen", 15:"fifteen", 16:"sixteen", 17:"seventeen", 18:"eighteen", 19:"nineteen"}
    if n < 10:
        return sayDigit(n)
    else:
        return stringTeen[n]

def sayTens(n):
    stringTen = {2:"twenty", 3:"thirty", 4:"forty", 5:"fifty", 6:"sixty", 7:"seventy", 8:"eighty", 9:"ninety"}
    div = n // 10
    rem = n % 10
    if n < 20:
        return sayTeen(n)
    elif rem(n) == 0: #type error: 'int' obj is not callable
        return stringTen[n]
    else:
        return stringTen[div] + "-" + sayDigit(rem)

print(sayTens(23))