$ pm_in_params.pl -i infile -o outfile -s statfile
Option -i = infile
Option -o = outfile
Option -s = statfile

$ pm_in_params.pl -i infile -o outfile -s statfile -z zzzzzzzz
Option -i = infile
Option -o = outfile
Option -s = statfile
Option -z = zzzzzzzz
-z option detected: zzzzzzzz