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Level 18 - EUTAERF
The answer to this puzzle is:
Words: AFREET, REFUTE, FEATER, FEUAR, EATER, ARETE, URATE, TURF, TEAR, UREA, TUFA, TARE, RETE, REEF, RAFT, FRAE, FART, FEAT, FETA, FETE, FERE, FRAT, FRET, TAR, ERE, FAT, ERA, ARE, FEE, ATE, ETA, FER, TAU, REF, RUE, AFT, TEE, RUT
Bonus words:
AFREET, REFUTE, FEATER, FEUAR, EATER, ARETE, URATE, TURF, TEAR, UREA, TUFA, TARE, RETE, REEF, RAFT, FRAE, FART, FEAT, FETA, FETE, FERE, FRAT, FRET, TAR, ERE, FAT, ERA, ARE, FEE, ATE, ETA, FER, TAU, REF, RUE, AFT, TEE, RUT