In this program, you will check whether two dominoes match. Because you can flip a tile, two tiles match if the number on the left or right matches the left or right on the other tile. You should...

In this program, you will check whether two dominoes match.

Because you can flip a tile, two tiles match if the number on the left or right matches the left or right on the other tile.

You should print all matches. First check a direct match, then try flipping tiles. But don’t flip a tile whose left and right numbers are the same. If there is no match, print "No match".

For example, with the tiles 1 3 and 4 3, print

1 3 3 4

Three of my tests are failing since there are duplicates of the print results. How would I go about to remove the duplicate?