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

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

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

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

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