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

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

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

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

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