(0 20 2)(1 15 10 5 3)(4 8 6)(7 12 11)(9 21 19 17 13)(14 18 16)
ALLOWS (11/8)-SEQUENCE
1: (0 1 2)

(0)(1 20 2 15 10 5 3)(4 8 6)(7 12 11)(9 21 19 17 13)(14 18 16)
2: (2 15 20)

(0)(1 20 10 5 3)(2)(4 8 6)(7 12 11)(9 21 19 17 13)(14 18 16)(15)
3: (9 21 19)

(0)(1 20 10 5 3)(2)(4 8 6)(7 12 11)(9 17 13)(14 18 16)(15)(19)(21)
4: (1 20 3)

(0)(1)(2)(3 10 5)(4 8 6)(7 12 11)(9 17 13)(14 18 16)(15)(19)(20)(21)