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

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

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

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

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