The U, as in rule, is the kissing vowel. Put your lips in a kissing position and have the Long U sound. However, sometimes we say only the Long U, and sometimes we say Y + Long U.
The Yu, as in Music…….
U as in “Rule”
blue, do, food, group, knew, moon, move, new, room, rule, school, soon, through, too, true, two, usual, who, you.
YU as in “Music”
beauty, computer, cute, few, fuse, music, unit, use, usual.