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

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

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

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

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