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

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

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

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

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