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

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

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

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

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