Using Excel 2003

I have 5 groups of 2 columns with 50 rows for each group of columns. I am
using an electronic device to input values into the cells. I have excel set
to move the cursor right after entering data.

What I want to do is when I am in the second column in a group and I enter
the data, I want the cursor to auto move back to the 2nd row in the 1st
column in that group.

For example

A b E F I J
1
2
3

When the data is entered into b1, I want the cursor to go to A2. when I
enter the data into b2, I want the cursor to move to A3 and so on down to row
50.

I would like to do this for each group of columns, i.e AB EF IJ, etc.

I have somewhat figured out how do do this, but it would take a lot of lines
of code.

Is there anyway I can do this fairly easily?

Thanks for your help