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Level 12 - EATTMR
The answer to this puzzle is:
Words: RAMET, ARMET, TAMER, TETRA, MATER, MATTE, TATER, TART, TARE, TAME, TEAT, MATT, REAM, META, MART, TATE, ARM, ARE, TAR, TAT, ATE, TAM, REM, MET, MAR, ETA, ATT, RAT
Bonus words:
RAMET, ARMET, TAMER, TETRA, MATER, MATTE, TATER, TART, TARE, TAME, TEAT, MATT, REAM, META, MART, TATE, ARM, ARE, TAR, TAT, ATE, TAM, REM, MET, MAR, ETA, ATT, RAT