Imagine I have the following two columns with the following values

Numbers (column 1):

- First Row: 1, 2, 3

Letters (column 2)

- First Row: a, b

Now I have Column 3. I want the values for column three to be determined by looping through the values of columns 1 and 2 and combining them as follows:

- Row 1: 1a
- Row 2: 1b
- Row 3: 2a
- Row 4: 2b
- Row 5: 3a
- Row 6: 3c

In short, I want to loop through each value in column one and then add it to each value in column two (by looping through it’s values).

Any idea how I could do this using coda formulas?

Thanks.