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

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

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

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

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