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

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

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

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

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