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

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

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

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

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