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