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Level 10 - OOYTCGOL
The answer to this puzzle is:
Words: OCTYL, OLOGY, COLOG, CLOOT, COOLY, COOT, COLY, CLOY, LOGY, TOYO, LOCO, CLOG, TOGO, TOO, COL, COT, COO, COY, COG, GOY, GOT
Bonus words:
OCTYL, OLOGY, COLOG, CLOOT, COOLY, COOT, COLY, CLOY, LOGY, TOYO, LOCO, CLOG, TOGO, TOO, COL, COT, COO, COY, COG, GOY, GOT