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

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

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

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

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