Define a function hand_to_string that accepts a list of three integers as described in the 3-card poker assignment, and returns a string suitable for showing the hand to the player.

The string should have the cards on the same line with one space between them and no spaces on either side. Values 2-9 may be displayed as usual. Values 10-14 should be displayed as X, J, Q, K, A, respectively.

Define at least three assert_equal tests for your function.

Hint: Define a helper function (e.g., convert_hand) that converts a single integer to the appropriate string. Then you can use that function three times!