#!/usr/bin/env python3
import sys
n = int(sys.argv[1])
ones = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
teens = ["ten", "eleven", "twelve", "thirteen", "fourteen","fifteen", "sixteen", "seventeen", "eighteen", "nineteen"]
tens = ["", "", "twenty", "thirty", "forty","fifty", "sixty", "seventy", "eighty", "ninety"]
if n < 10:
    print(ones[n])
elif n < 20:
    print(teens[n - 10])
else:
    t = n // 10
    o = n % 10
    if o == 0:
        print(tens[t])
    else:
        print(f"{tens[t]}-{ones[o]}")