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

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

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

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

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