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

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

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

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

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