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

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

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

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

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