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

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

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

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

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