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

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

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

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

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