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

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

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

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

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