a: solo. b: t group. c: f group. d: t group. e: solo. f: f group. g: solo. h: duet. i: duet. j: duet. k: t group. l: trio. m: duet. n: s group. o: duet. p: trio. q: s group. r: t group. s: s group. t: t group. u: duet. v: f group. w: duet. x: duet. y: t group. z: s group. 1: trio. 2: s group. 3: solo. 4: duet. 5: s group. 6: duet. 7: f group. 8: solo. 9: f group.
