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

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

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

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

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