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

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

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

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

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