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

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

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

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

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