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

Crossword clues for Rubik invention:

ERNO: Rubik who invented Rubik's Cube
CUBE: Rubik invention
CUBE: Rubik's invention
ERNO: Rubik who invented a twistable toy
CUBE: Erno Rubik's best-known invention