What are the possible outcomes on the sum of two 6-sided dice where the first number is less than 4?

If the first number is less than 4, then the possible outcomes on the sum of two 6-sided dice are limited to the following combinations:

1 + 1 = 2
1 + 2 = 3
1 + 3 = 4
2 + 1 = 3
2 + 2 = 4
2 + 3 = 5
3 + 1 = 4
3 + 2 = 5
3 + 3 = 6

So, the possible outcomes are 2, 3, 4, 5, and 6.