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