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Level 15 - AYFLNLI
The answer to this puzzle is:
Words: INFALL, LAYIN, FLAIL, FILLY, ALIF, ILLY, FAIN, ANIL, LILY, AYIN, YILL, LINY, INLY, FLAN, FILA, LAIN, ALLY, LAY, FLY, NAY, YIN, FIN, NIL, ALL, ILL, AIL, LIN, ANY, ANI
Bonus words:
INFALL, LAYIN, FLAIL, FILLY, ALIF, ILLY, FAIN, ANIL, LILY, AYIN, YILL, LINY, INLY, FLAN, FILA, LAIN, ALLY, LAY, FLY, NAY, YIN, FIN, NIL, ALL, ILL, AIL, LIN, ANY, ANI