Joined pipelines

Considering a routine such as this one: alpha() { echo a b c |tr ' ' '\n'; } which outputs a stream, I would like to take the output stream, transform it, and paste it with the original output stream. If I take use upcasing as a sample transformation, I can achieve what I want with: $ mkfifo p1 p2 $ alpha | tee p1 >( tr a-z A-Z > p2) >/dev/null & $ paste p1 p2 a A b B c C My question is, is there a better way to do this, preferably one not involving named pipes?