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