Solutions :

Boggle R I U A J Y T T I I B D M H E F

3-letter words (1 point): 21

ATT; BED; BIT; DEB; DEF; DEI; FED; FEH; HIE; HIM; HIT; ITA; JIB; MIB; RIT; TAT; TAU; TIE; TUI; TUT; UTA.

4-letter words (1 point): 12

BITT; DEBT; FEHM; HIED; JIBE; MIHI; MITT; MITY; RITT; TATU; TAUT; TIED.

5-letter words (2 points): 5

DEBIT; DEITY; JIBED; TATIE; YITIE.

6-letter word (3 points): 1

MIHIED.