(0 20 17)(1 19 8 6 3)(2 5 4)(7 11 9)(10 15 13)(12 21 18 16 14)
ALLOWS (11/8)-SEQUENCE
1: (0 2 17)

(0)(1 19 8 6 3)(2 20 17 5 4)(7 11 9)(10 15 13)(12 21 18 16 14)
2: (1 19 3)

(0)(1)(2 20 17 5 4)(3 8 6)(7 11 9)(10 15 13)(12 21 18 16 14)(19)
3: (16 21 18)

(0)(1)(2 20 17 5 4)(3 8 6)(7 11 9)(10 15 13)(12 21 14)(16)(18)(19)
4: (2 20 4)

(0)(1)(2)(3 8 6)(4 17 5)(7 11 9)(10 15 13)(12 21 14)(16)(18)(19)(20)