When I'm calling you-oo-ooo-ooo

I had a terrific idea for some new puzzles for work - a topic with many variations on the same theme, so lots of output from very little input. It didn't work. :( The idea is still brilliant, but most bingo calls are just too long, and I could only just get one puzzle out instead of the three I'd imagined. Damn. Back to the drawing-board and more searching for novel topics.

CNPS: 132