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

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

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

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

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