(0 20 4)(1 17 10 7 5)(2 9 3)(6 12 8)(11 21 19 16 13)(14 18 15)
ALLOWS (11/8)-SEQUENCE
1: (0 1 4)

(0)(1 20 4 17 10 7 5)(2 9 3)(6 12 8)(11 21 19 16 13)(14 18 15)
2: (4 17 20)

(0)(1 20 10 7 5)(2 9 3)(4)(6 12 8)(11 21 19 16 13)(14 18 15)(17)
3: (16 21 19)

(0)(1 20 10 7 5)(2 9 3)(4)(6 12 8)(11 21 13)(14 18 15)(16)(17)(19)
4: (1 20 10)

(0)(1 7 5)(2 9 3)(4)(6 12 8)(10)(11 21 13)(14 18 15)(16)(17)(19)(20)