# L-9 MCS 260 Mon 1 Feb 2010 : write_numbers.py
#
# When writing a check, the amount is spelled out in words.
# The program below writes numbers strictly less than 1000 into words.
#
d = { 0:'zero', 1:'one', 2:'two', 3:'three', 4:'four', \
      5:'five', 6:'six', 7:'seven', 8:'eight', 9:'nine', \
      10:'ten', 11:'eleven', 12:'twelve', 13:'thirteen', \
      14:'fourteen', 15:'fifteen', 16:'sixteen', 17:'seventeen', \
      18:'eighteen', 19:'nineteen', 20:'twenty', 30:'thirty', \
      40:'forty', 50:'fifty', 60:'sixty', 70:'seventy', 80:'eighty', \
      90:'ninety', 100:'hundred' \
}
n = input('give a natural number : ')
outcome = '%d is ' % n
if n == 0:
   outcome += d[n]
elif n >= 100:
   outcome += d[n/100] + ' ' + d[100]
   n = n % 100
   if n != 0:
      outcome += ' and '
if n > 0: 
   if n <= 20:
      outcome += d[n]
   else:
      r = n % 10
      if r == 0:
         outcome += d[n]
      else:
         outcome += d[n-r] + ' ' + d[r]
print outcome