vhod = int (input())
a = vhod // 10
b = vhod % 10
if vhod == 0:
    print("zero")
elif vhod == 100:
    print("a hundred")
if a == 0 :
    if b == 1:
        print("one")
    if b == 2:
        print("two")
    if b == 3:
        print("three")
    if b == 4:
        print("four")
    if b == 5:
        print("five")
    if b == 6:
        print("six")
    if b == 7:
        print("seven")
    if b == 8:
        print("eight")
    if b == 9:
        print("nine")
elif a == 1:
    if b == 0:
        print("ten")
    if b == 1:
        print("eleven")
    if b == 2:
        print("twelve")
    if b == 3:
        print("thirteen")
    if b == 4:
        print("fourteen")
    if b == 5:
        print("fivteen")
    if b == 6:
        print("sixteen")
    if b == 7:
        print("seventeen")
    if b == 8:
        print("eighteen")
    if b == 9:
        print("nineteen")
elif a == 2 :
    c = "twenty"
    if b == 0:
        print(c)
    if b == 1:
        print(c+" one")
    if b == 2:
        print(c+" two")
    if b == 3:
        print(c+" three")
    if b == 4:
        print(c+" four")
    if b == 5:
        print(c+" five")
    if b == 6:
        print(c+" six")
    if b == 7:
        print(c+" seven")
    if b == 8:
        print(c+" eight")
    if b == 9:
        print(c+" nine")
elif a == 3 :
    c = "thirty"
    if b == 0:
        print(c)
    if b == 1:
        print(c+" one")
    if b == 2:
        print(c+" two")
    if b == 3:
        print(c+" three")
    if b == 4:
        print(c+" four")
    if b == 5:
        print(c+" five")
    if b == 6:
        print(c+" six")
    if b == 7:
        print(c+" seven")
    if b == 8:
        print(c+" eight")
    if b == 9:
        print(c+" nine")
elif a == 4:
    c = "forty"
    if b == 0:
        print(c)
    if b == 1:
        print(c+" one")
    if b == 2:
        print(c+" two")
    if b == 3:
        print(c+" three")
    if b == 4:
        print(c+" four")
    if b == 5:
        print(c+" five")
    if b == 6:
        print(c+" six")
    if b == 7:
        print(c+" seven")
    if b == 8:
        print(c+" eight")
    if b == 9:
        print(c+" nine")
elif a == 5:
    c = "fifty"
    if b == 0:
        print(c)
    if b == 1:
        print(c+" one")
    if b == 2:
        print(c+" two")
    if b == 3:
        print(c+" three")
    if b == 4:
        print(c+" four")
    if b == 5:
        print(c+" five")
    if b == 6:
        print(c+" six")
    if b == 7:
        print(c+" seven")
    if b == 8:
        print(c+" eight")
    if b == 9:
        print(c+" nine")
elif a == 6:
    c = "sixty"
    if b == 0:
        print(c)
    if b == 1:
        print(c+" one")
    if b == 2:
        print(c+" two")
    if b == 3:
        print(c+" three")
    if b == 4:
        print(c+" four")
    if b == 5:
        print(c+" five")
    if b == 6:
        print(c+" six")
    if b == 7:
        print(c+" seven")
    if b == 8:
        print(c+" eight")
    if b == 9:
        print(c+" nine")
elif a == 7:
    c = "seventy"
    if b == 0:
        print(c)
    if b == 1:
        print(c+" one")
    if b == 2:
        print(c+" two")
    if b == 3:
        print(c+" three")
    if b == 4:
        print(c+" four")
    if b == 5:
        print(c+" five")
    if b == 6:
        print(c+" six")
    if b == 7:
        print(c+" seven")
    if b == 8:
        print(c+" eight")
    if b == 9:
        print(c+" nine")
elif a == 8:
    c = "eigty"
    if b == 0:
        print(c)
    if b == 1:
        print(c+" one")
    if b == 2:
        print(c+" two")
    if b == 3:
        print(c+" three")
    if b == 4:
        print(c+" four")
    if b == 5:
        print(c+" five")
    if b == 6:
        print(c+" six")
    if b == 7:
        print(c+" seven")
    if b == 8:
        print(c+" eight")
    if b == 9:
        print(c+" nine")
elif a == 9:
    c = "ninety"
    if b == 0:
        print(c)
    if b == 1:
        print(c+" one")
    if b == 2:
        print(c+" two")
    if b == 3:
        print(c+" three")
    if b == 4:
        print(c+" four")
    if b == 5:
        print(c+" five")
    if b == 6:
        print(c+" six")
    if b == 7:
        print(c+" seven")
    if b == 8:
        print(c+" eight")
    if b == 9:
        print(c+" nine")