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