Retrieve 1st Letters from Full Name

Hi

am using MS Office 2007

I have a column (eg: A) contains NAMES which consists of 1 word name (First name), 2 word names(First name & Last name) and 3 word names (First name , Middle name and Last name).

Eg.

Column A
=======
Xavier
xavier jose
Xavier jose kozhiparambil

etc....

i appreciate your help in obtaining result in

Column B
=======
X
X J
X J K

respectively ...... (i.e. X for Xavier; X J for Xavier Joseph; X J K for Xavier Jose Kozhiparambil)
in B

with 1 space between all Characters - all CAPS (irrespective of what the source case is)
Please refer to the Excel file for any clarification.

Please do help me asap