For the first line of input, the first RE matches Version ..., and stores rdtg7.0.4.7.

For the second line, the first RE matches Hardware version ... and stores 0;.

For the third line, the second RE matches SW_REV... and stores CG4D_05.

Update: zpy, I don't see how you get the third line of your output, FW: 4.1.4p. That can only be grabbed by the first RE, which has already used up it's one try at the input data matching Hardware version."