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