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Level 15 - TISEIDV
The answer to this puzzle is:
Words: TEIIDS, TIDIES, TIDES, DIETS, EDITS, SITED, IVIES, DITES, DEIST, STIED, IVIED, TEIID, VISED, VIES, IDES, DEVS, DITE, DITS, VIED, VETS, VIDS, TIED, TIES, VIDE, VISE, DIES, VIE, DIE, DIT, VET, ITS, EDS, TED, DIS, IDS, VID
Bonus words:
TEIIDS, TIDIES, TIDES, DIETS, EDITS, SITED, IVIES, DITES, DEIST, STIED, IVIED, TEIID, VISED, VIES, IDES, DEVS, DITE, DITS, VIED, VETS, VIDS, TIED, TIES, VIDE, VISE, DIES, VIE, DIE, DIT, VET, ITS, EDS, TED, DIS, IDS, VID