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

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

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

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

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