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