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

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

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

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

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