n = int(input())
up_change = 0
ones = ["", "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 "]
orders = ["","thousand ", "million ", "billion "]
h = "hundred "
word = ""
while n > 0:
    s = n % 1000
    if up_change > 0  and s > 0:
        if s <= 9:
            o = s % 10
            word = ones[o] + orders[up_change] + word
        if s < 20 and s > 9:
            te = s % 10
            word = teens[te] + orders[up_change] + word
        if s <= 99 and s >= 20:
            o = s % 10
            t = (s // 10) % 10
            word = tens[t] + ones[o] + orders[up_change] + word
        if s <= 999 and s >=100 :
            o = s % 10
            t = (s // 10) % 10
            oh = (s // 100) % 10
            word = ones[oh] + h + tens[t] + ones[o] + orders[up_change] + word
    else:
        if n == 0:
            word = "zero"
            break
        if s <= 9 :
            o = s % 10
            word = ones[o] + word
        if  s < 20 and s > 9:
            te = s % 10
            word = teens[te] + word
        if  s <= 99 and s >= 20:
            o = s % 10
            t = (s // 10)%10
            word = tens[t] + ones[o] + word
        if  s <= 999 and s >= 100:
            if 9 < (s % 100) and (s % 100) < 20:
                te = s % 10
                oh = (s // 100) % 10
                word = ones[oh] + h + teens[te] + word
            else:
                o = s % 10
                t = (s // 10) % 10
                oh = (s // 100) % 10
                word = ones[oh] + h + tens[t] + ones[o] + word
    up_change +=1
    n = n // 1000
print(word)