Each of the letters represent a different digit from 0 to 9 in the following alphanumeric subtraction problem:
SPACE
- CENT
3651
What is the word representing 3651? How about 15631?
Note: Neither S nor C can be 0.
AT has the correct solution. The computerized solution shows that this is the only solution.
DM refers to a second problem, but I am not sure what that is. I interpret the request "How about 15631?" as asking for the literals values (STEPS) corresponding to the literals derived from the original subtraction solution.
If there is a second problem: SPACE - CENT = 15631, there are 13 preliminary solutions:
18326 - 2695
18427 - 2796
19236 - 3605
19438 - 3807
20347 - 4716
20549 - 4918
23579 - 7948
23680 - 8049
23781 - 8150
24387 - 8756
24791 - 9160
25094 - 9463
25498 - 9867
All except the first and the third lack one or two of the digits in 15631. The first gives STEAS and the third gives STECS, which DM suggests are probably not "words" in the usual sense although they are strings of letters. KS will have to give his verdict on his intention for the final part of his puzzle.