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

Crossword clues for Ukr. and Lith., formerly:

SSRS: Lith. and Ukr., formerly
SSRS: Ukr. and Lith., formerly
SSR: Ukr. or Lith., formerly
SSR: Lith. or Ukr., formerly