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

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

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

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

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