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

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

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

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

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