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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Versatile openers:

SKELETONKEY: Versatile opener
PASSKEYS: Versatile openers
SKELETONKEY: Versatile opener on Halloween?
SKELETONKEY: Versatile lock opener
PASSKEY: Versatile lock opener