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