REVOKE
If 1, then T is second to last as the only change from REVOTE to REVOKE was T->K and the score dropped one.
If 3, then E is second,last, and K is second to last, as
DELETE
REVOTE
The only same letters are E, T, and E.
So if T is changed and the score is up one,
a. the E's must score, as they are the only ones that could have scored.
b. If 3, K is second to last as the only change from REVOTE was T->K but the score added one.
If 2, then the E's score as since the only change from REVOTE to REVOKE was T->K, and the score staeyed the same, meaning the E's are the only ones that could have scored.