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

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

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

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

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