Cryptarithmetic Puzzles for 2023, Puzzle #14 STEP + PUP = PETS

Sure, sure, this is a bit of a stretch, but I’m sure there is a puppet joke in there or a joke about pets … Anyway, this entire puzzle is a palindrome (either as STEP PUPPETS or STEP PUP, PETS). STEP + PUP = PETS

Solutions are below the image. Enjoy!

SPOILER SOLUTIONS!

STEP_first PUP_second PETS_third
8219 909 9128
8329 909 9238
8439 909 9348
8549 909 9458
8659 909 9568
8769 909 9678