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Level 19 - HALUNFD
The answer to this puzzle is:
Words: ULNAD, FAULD, UHLAN, DAHL, DHAL, AULD, ULNA, LAUD, FAUN, FLAN, LAND, HULA, LUNA, DAH, DUH, LAD, FAD, DUN, NAH, HAD
Bonus words:
ULNAD, FAULD, UHLAN, DAHL, DHAL, AULD, ULNA, LAUD, FAUN, FLAN, LAND, HULA, LUNA, DAH, DUH, LAD, FAD, DUN, NAH, HAD