if(($array1[0]=~/c/i) && ($array2[0]= ~/c/i))

{
     if ($arra1[2]=array2[2] && array1[4]=array2[4])
	     {
		 don't add anything 
		 }
	 else
        {
		append matched line to file2
		}		
		
}

elsif(($array1[0]=~/M/i) && ($array2[0]= ~/M/i))

{
       
if ($arra1[2]=array2[2] && array1[4]=array2[4])
	     {
		 don't add anything 
		 }
	 else
        {
		append matched line to file2
		}

}