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

Crossword clues for Rickenbacker and von Richthofen:

ACES: Rickenbacker and von Richthofen
ACE: Rickenbacker or von Richthofen
ACES: Eddie Rickenbacker and Baron von Richthofen
ACES: Eddie Rickenbacker and Manfred von Richthofen
ACES: Eddie Rickenbacker and Manfred von Richthofen, e.g.
WWIACES: Manfred von Richthofen and Eddie Rickenbacker, e.g.