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