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

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

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

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

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