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

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

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

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

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