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

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

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

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

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