What is the sample space of the sum of two 6-sided die where the first number is less than 4?

List your values from smallest to largest.
Normally we would put commas when making a list but do not this for the question. Put a single space. Example: instead of
1, 2 we write 12
The sample space is {
}.

12 13 14 15 16 21 22 23 24 25 31 32 33