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Level 13 - LYRAPLO
The answer to this puzzle is:
Words: PYROLA, ORALLY, PALLOR, ALLOY, PAYOR, LORAL, PALLY, PAROL, ALLY, ROPY, POLY, PYRO, PLOY, PALL, OPAL, ARYL, POL, PAR, PRO, PRY, YAP, OAR, LOP, PLY
Bonus words:
PYROLA, ORALLY, PALLOR, ALLOY, PAYOR, LORAL, PALLY, PAROL, ALLY, ROPY, POLY, PYRO, PLOY, PALL, OPAL, ARYL, POL, PAR, PRO, PRY, YAP, OAR, LOP, PLY