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

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

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

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

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