__author__ = 'Zlobober'
n = int(raw_input())
A = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
"ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"]
B = ["twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"]
if n < 20:
print A[n]
else:
a = (n // 10) - 2
b = n % 10
if b == 0:
print B[a]
else:
print B[a] + "-" + A[b]
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