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