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

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

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

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

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