This one's a fun take on the typical paradiddle-diddle turnaround you may have seen Pat Petrillo or Tommy Igoe perform. Instead of all the notes being semiquavers, the paradiddle-diddle (RLRRLL) is a sextuplet, followed by a straight paradiddle (RLRR). The paradiddle, or turnaround, switches your hands so the next bar leads with your alternate hand.
This exercise will get you comfortable switching between different tuplet groupings.