Fifteen

Developed by Pedro Izecksohn.

1 2 4 7
D 5 A 8
E 3 6 F
9 C _ B

Fifteen

1 2 4 7 D 5 A 8 E 3 6 F 9 C _ B

1 2 4 7
D 5 A 8
E 3 6 F
9 C _ B