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

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

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

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

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