Counting multiple cells over multiple worksheets

I have a workbook with multiple worksheets. One worksheet for each month.
On each worksheet i have a list of initials in column A. In column B, is either 'In' or 'out'.

I need to count which initial did how many ins or outs.

I know I can use the filters, but i was thinking of something more along the lines of a drop down box that you select your initial and another where you select 'In' or 'Out', then it gives you a number.

Please see attached file.