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You have 10 groups of 4 words:
DUO, IRON, LINKS, ROCK
ICE, LED, METAL, TIC
DRILL, PI, WIN, WOO
BRA, IGNITE, LOOM, RUBBISH
AIR, DUST, GO, PAT
AUDI, AURA, MEOW, SPEW
GRIMM, HOOT, MUD, TAIL
ASK, BELL, CATER, MEDIC
BLITZ, CRUST, PLUS, SQUIRT
CHERUB, SEE, SHIN, STEEL
And another group of 10 words:...