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