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

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

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

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

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