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

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

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

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

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