Solutions :

3-letter words (1 point): 24

AUE; BEE; EAU; ERE; EWE; HEP; IRE; JEW; LEI; LEW; PEA; PEE; PEH; PIE; PIR; PIU; PRE; PUR; REE; REI; REW; RIP; RUE; URE.

4-letter words (1 point): 24

BEEP; BREI; BREW; EPEE; EWER; IURE; JUPE; JURE; LEIR; LERP; PEER; PIER; PUER; PUIR; PURE; PURI; RIEL; RIPE; UREA; WEIR; WERE; WIEL; WIPE; WIRE.

5-letter words (2 points): 7

AERIE; AUREI; EERIE; JEWIE; PUREE; RUPEE; WRIER.

6-letter words (3 points): 5

AERIER; BREWER; EERIER; PEERIE; REWIRE.

7-letter words (7 points): 2

PEERIER; PREWIRE.