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Level 18 - OEINPRE
The answer to this puzzle is:
Words: PEREION, REOPEN, REPINE, PERNIO, ORPINE, PEREON, PREEN, OPINE, IRONE, REPIN, ORPIN, PRION, RIPEN, NOIR, INRO, PERE, PIER, PEON, NORI, PEEN, PION, PERI, REPO, ERNE, PONE, PORN, NEEP, ORE, PIE, PER, NOR, ION, PEN, ROE, IRE, ERE, NIP, NEE, POI, REP, PIN, EON, PEE
Bonus words:
PEREION, REOPEN, REPINE, PERNIO, ORPINE, PEREON, PREEN, OPINE, IRONE, REPIN, ORPIN, PRION, RIPEN, NOIR, INRO, PERE, PIER, PEON, NORI, PEEN, PION, PERI, REPO, ERNE, PONE, PORN, NEEP, ORE, PIE, PER, NOR, ION, PEN, ROE, IRE, ERE, NIP, NEE, POI, REP, PIN, EON, PEE