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