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

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

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

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

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