Does anyone know how to compare two MS Word tables, look for matching entries in the first columns of each tables, and if a match is found take info from the second column of Table #2 and append it to the info in the first column of Table #1?

example:

Table 1
1
10
2

Table 2
3 a
10 b
12 c
2 d

the desired result would look like this:

Table 1
1
10, b
2, d

This is driving me nuts. Useful suggestions would be greatly appreciated.