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

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

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

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

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