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

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

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

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

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