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

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

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

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

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