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

Crossword clues for Chimp who orbited Earth in 1961:

ENOS: Earth-orbiting chimp
ENOS: First chimp to orbit Earth
ENOS: Chimp who orbited Earth in 1961
ENOS: Chimp who orbited the earth in 1961