Correct: cube, tube, cute, flute, tune, plume, dude, rude, mute, dupe, rescue, issue, clue, argue, June, duke, blue, mule, Incorrect: plum, cub, rub, cut, shut, nut, dud, mut, rut, dup, pup, gum, sum, tum, jun, duck, mull, mutt,

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