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

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

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

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

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