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

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

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

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

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