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