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