Insert space before last character

Dear group:

I am trying to insert space after first character in a line and a
space before last character in same line using command mode. I could
introduce space before first character but could not insert space
before last character.


F783S
Y625D
A1705V

:%s//\(^.\)/\1 /g results in

F 783S
Y 625D
A 1705V


now I want to give space before last character to get following:

F 783 S
Y 625 D
A 1705 V

I tried different ways and could not introduce space. I am successful
in remove the last character. Could anyone help please.


Thanks
Adrian

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