23676

0:0
1:0
2:0
3:0
4:0

4:1
3:1
2:1
1:1
0:1

4:2
3:2
2:2
1:2
0:2

I did this by starting with the second number as 0 then going through each and every number between 0 and 4 as the end score was 4, so the number on the left has to be between 0 and 4. The next step i did was making the second number 1 then changing the left number by 1 each time, starting at 0 and ending in 4. Then i changed the second number to 2, the last number possible, and went through all numbers from 0 to 4 again making my final answer 15. 5 possible scores for each number change on the right.