Introduction - If you have any usage issues, please Google them yourself
Write a program 6174 conjecture, validation request use function. The content of 6174 guess roughly include: any more than 1,000 4 digits, if each not all equal, after seven times most commutation can become 6174 K. K transform is sending four digits from large to small rearrange minus childhood rearrange and evaluated. Such as: 4948
1:9844-4489 = 5355
2: 5553- 3555 = 1998
3: 9981- 1899 = 8082
4: 8820- 288 = 8532
5: 8532- 2358 = 6174