digit = input()


match digit:
    case '0':
        print('zero')
    case '1':
        print('one')
    case '2':
        print('two')
    case '3':
        print('three')
    case '4':
        print('four')
    case '5':
        print('five')
    case '6':
        print('six')
    case '7':
        print('seven')
    case '8':
        print('eight')
    case '9':
        print('nine')
    case _:
        print('not a digit')