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