Finding tags in file names using csh

I have the following script and want to check if in each $f there exists either a "drw" or "smp" tag in the file name. How can I do it?

For example

npt06-32x24drw has the "drw" tag
npt06-32x24smp has the "smp" tag
npt06-32x24 no "drw" or "smp" tag found

#!/bin/csh

  set iarg = 0
  set optusage = 0
  set opteg = 0
  set opthelp = 0
  set optinfo = 0
  set fnames = ""

  alias MATH 'set \!:1 = `echo "\!:3-$" | bc -l`'
  set narg = $#argv
  while ($iarg < $narg)

    MATH iarg = $iarg + 1
    set arg = $argv[$iarg]
    set opt = ` echo $arg | awk 'BEGIN { FS="=" } { print $1 }'  \
                          | tr "[a-z]" "[A-Z]" `
    set par = ` echo $arg | awk 'BEGIN { FS="=" } { print $2 }' `

    switch ($opt)
    case "-USAGE":
        set optusage = 1
        set optinfo = 1
        breaksw
    case "-EG":
        set opteg = 1
        set optinfo = 1
        breaksw
    case "-HELP":
        set opthelp = 1
        set optinfo = 1
        breaksw
    default:
        set flog = `echo $arg | awk 'BEGIN {FS=".log"} {print $1}'`
        set fnames = "$fnames $flog"
    endsw

  end   # while



  if ($fdrw) then

    foreach f ($fnames)

      echo "(I) ${f}.log, (O) ${f}.mis"

      grep "Rms Value" $f*.log              \
        | awk '{ if ($0 !~ /run[0-9]+\.log:0\. /)  \
                 { sub(/[^:]*:[0-9]*\.[ \t]*/,x); print i++". " $0 }  \
               }' > $f.mis

      grep "Best Value" $f*.log             \
        | awk '{ if ($0 !~ /run[0-9]+\.log:0\. /)  \
                 { sub(/[^:]*:[0-9]*\.[ \t]*/,x); print i++". " $0 }  \
               }' >> $f.mis

    end

  elseif ($fsmp) then

    foreach f ($fnames)

      echo "(I) ${f}.log, (O) ${f}.mis"

      grep "Best Value" $f*.log             \
        | awk '{ if ($0 !~ /run[0-9]+\.log:0\. /)  \
                 { sub(/[^:]*:[0-9]*\.[ \t]*/,x); print i++". " $0 }  \
               }' >> $f.mis

  endif


  echo ""
  echo "END"
  echo ""