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