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Level 18 - OOOKATCC
The answer to this puzzle is:
Words: ACOCK, COACT, TOOK, COCA, TACK, COCO, COOT, KOTO, COCK, TOO, COT, ACT, COO
Bonus words:
ACOCK, COACT, TOOK, COCA, TACK, COCO, COOT, KOTO, COCK, TOO, COT, ACT, COO