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

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

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

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

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