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

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

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

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

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