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

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

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

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

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