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Level 16 - NGHTNIO
The answer to this puzzle is:
Words: TONING, NOTING, HONING, HONGI, TIGON, NITON, INGOT, THONG, OHING, HINT, NIGH, TING, HONG, INTO, GOTH, GIN, GOT, NOT, TON, HON, NTH, THO, GIT, NIT, NOG, HOT, TIN
Bonus words:
TONING, NOTING, HONING, HONGI, TIGON, NITON, INGOT, THONG, OHING, HINT, NIGH, TING, HONG, INTO, GOTH, GIN, GOT, NOT, TON, HON, NTH, THO, GIT, NIT, NOG, HOT, TIN