A/B: bug, bus, cub, cup, sun, rug, hug, nut
C: cube, flute, mule, plume, tube, dune, rule, cute
D: absorb, anchor, brush, bud, center, core, factory, hive, sapling, trunk
A/B: bug, bus, cub, cup, sun, rug, hug, nut
C: cube, flute, mule, plume, tube, dune, rule, cute
D: absorb, anchor, brush, bud, center, core, factory, hive, sapling, trunk