Brain Game: We Thank You All

Today's mentalfloss.com Brain Game Wednesday Wordplay challenge is the final one this week, as we take a couple days off to give thanks for all we have. Even if you don't have the day off, take some time to thank those who really deserve it. You know who they are.

By changing one letter in each step to form English words, and leaving all other letters in their original positions, convert BLESS into FOLKS in the fewest possible steps.

B L E S S
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F O L K S