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

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

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

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

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