iterations = 0
number = raw_input("Enter a four digit number, using at least two different digits: ")
while number != 6174:
    iterations += 1
    ascending = int(''.join(sorted(str(number))))
    print ascending
    descending = int(''.join(reversed(str(ascending))))
    print descending
    if ascending > descending:
        number = ascending - descending
        print str(ascending) + ' - ' + str(descending)  + ' = ' + str(number)
    else:
        number = descending - ascending
        print str(descending) + ' -  ' + str(ascending) + ' = ' + str(number)
    number = str(number)
    number.zfill(4)
    print number