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Level 12 - EDTAIL
The answer to this puzzle is:
Words: TAILED, DILATE, LATED, AILED, TILED, TIDAL, TELIA, TILDE, LITE, TALI, TEAL, TIDE, ADIT, ALIT, AIDE, TELA, TIED, LATE, IDEA, TILE, DITA, LIED, DITE, LAID, DELI, DEIL, DALE, DIEL, LADE, LATI, DELT, LIT, ALT, ATE, LIE, AID, TEA, DEL, AIL, LEA, DIT, LED, ELD, TIL, ETA, LAD, TEL, TED, TAD, LAT, LID, LEI, LET
Bonus words:
TAILED, DILATE, LATED, AILED, TILED, TIDAL, TELIA, TILDE, LITE, TALI, TEAL, TIDE, ADIT, ALIT, AIDE, TELA, TIED, LATE, IDEA, TILE, DITA, LIED, DITE, LAID, DELI, DEIL, DALE, DIEL, LADE, LATI, DELT, LIT, ALT, ATE, LIE, AID, TEA, DEL, AIL, LEA, DIT, LED, ELD, TIL, ETA, LAD, TEL, TED, TAD, LAT, LID, LEI, LET