'"'"' 

##</code><code>##

 perl -pi -e 's#\Q(.*)\$/'"'"',\$lines,\$matches))10.(.*)\$/'"'"',\$lines,\$matches))(.*)\$/'"'"',\$lines,\$matches))# #gi' result.txt > result1.txt

-- Output (from perl - bash is happy!!!) --
Can't open result.txt: No such file or directory.