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Level 1 - OOTCLIAN
The answer to this puzzle is:
Words: OCTANOL, COOLANT, CATLIN, ATONIC, TALION, COITAL, CATION, OILCAN, ALNICO, COLONI, TINCAL, CITOLA, TOLAN, TONAL, ALOIN, NOTAL, TICAL, CLOOT, ACTIN, CONTO, ONTIC, CANTO, OCTAL, OCTAN, LINAC, NICOL, COTAN, LOTIC, COLIN, LOON, COON, LINT, COOT, NOTA, LOCI, OLIO, ANIL, TALI, TALC, LINO, CAIN, CLOT, LOCA, OTIC, TAIN, TOIL, IOTA, CLON, LOCO, ALIT, ICON, LOAN, COAL, CION, ONTO, LAIC, COAT, LION, NAIL, INTO, TACO, CLAN, COIN, CONI, LAIN, TOON, CALO, LATI, LOIN, CIAO, TAIL, ALTO, CANT, COIL, LOTI, AIL, ACT, COT, CON, TON, TIL, OIL, LOT, TOO, TIN, CAT, TAN, ANT, NOT, LIT, ION, NIT, LOO, CAN, OAT, LAC, ANI, COO, LIN, TIC, ALT, COL, NIL, LAT, ONO
Bonus words:
OCTANOL, COOLANT, CATLIN, ATONIC, TALION, COITAL, CATION, OILCAN, ALNICO, COLONI, TINCAL, CITOLA, TOLAN, TONAL, ALOIN, NOTAL, TICAL, CLOOT, ACTIN, CONTO, ONTIC, CANTO, OCTAL, OCTAN, LINAC, NICOL, COTAN, LOTIC, COLIN, LOON, COON, LINT, COOT, NOTA, LOCI, OLIO, ANIL, TALI, TALC, LINO, CAIN, CLOT, LOCA, OTIC, TAIN, TOIL, IOTA, CLON, LOCO, ALIT, ICON, LOAN, COAL, CION, ONTO, LAIC, COAT, LION, NAIL, INTO, TACO, CLAN, COIN, CONI, LAIN, TOON, CALO, LATI, LOIN, CIAO, TAIL, ALTO, CANT, COIL, LOTI, AIL, ACT, COT, CON, TON, TIL, OIL, LOT, TOO, TIN, CAT, TAN, ANT, NOT, LIT, ION, NIT, LOO, CAN, OAT, LAC, ANI, COO, LIN, TIC, ALT, COL, NIL, LAT, ONO