Inter-Connectedness of All Things

B8. Listen to this audio clip.
This is the title song of a 1960 Elvis Presley movie, filmed immediately after his discharge from the Army. The chorus of the song, which follows the bit you just heard, goes like this:

"I got those hup-two-three-four occupation __ blues,
From my __ hair to the heels of my __ shoes..."

What abbreviation fills the blanks (they're all the same)?

A. GI

Here's the link, for those of you'd like to watch the video:
http://www.youtube.com/watch?v=JosUZjWUAkQ