awk -F, ' 		# Invoke awk to process your files with the field
			# separator set to ",".
FNR == NR {		# For lines in the 1st input file (the # of records in
			# the current file is the same as the # of records in
			# all files read so far)...
	ip[$1 "."]	# Add an element to the array ip[] with the index being
			# the text found in the 1st field from the first file
			# with a "." added to the end of that string.
	next		# Stop processing this input record and read the next
			# input line.
}
{	for(i in ip)	# For lines read from any following input files, loop
			# through all of the index values that have been used in
			# the array ip[], with "i" set to a different index each
			# time through the loop...
		if(index($2, i) == 1) {	# if the index for this time through the
					# loop identically matches a substring
					# starting with the 1st character of the
					# 2nd field in this file...
			print	# print the current input line...
			next	# and stop processing this line and read the
				# next input line
		}
}' file0[12].out	# End the script and name the two input files.

	ip[$1 "."]

	gsub(/[.]|$/, "[.]", $1)
	ip["^" $1]

		if(index($2, i) == 1) {

		if($2 ~ i) {