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

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

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

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

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