By changing one letter at a time to form new words, and leaving all other letters in their original positions, convert the word PASS into the word PLAY in seven (or fewer) steps. Good luck!

P A S S
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P L A Y

Here is a six-step SOLUTION.

A SIX-STEP SOLUTION:

PASS > BASS > BAAS > BRAS > BRAY > PRAY > PLAY

Did you come up with a different series of words? Please post your solution in the comments. Thanks!