Cruch Usage

[Ezio]

hey guys, I was hoping anyone could help me out with creating a wordlist how i desire with crunch.
eg- usr1pass1, usr2pass2, usr3pass3......usr99pass99 

[cooper]

I made a script to output a sequence. The lines with '

echo "$CURRENT"

produce the output so that can be trivially adapted to become "usr${CURRENT}pass${CURRENT}" on a sequence going from 1 to 99.