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

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

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

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

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