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