checkFile

in1 = raw_input("file 1 path:") #if using python 3, raw_input is input
in2 = raw_input("file 2 path:")
file1 = open(in1,'r')
file2 = open(in2,'r')
match = false
file3 = open("3.txt",'w')
for line1 in file1:
	for line2 in file2:
		if line1 != " " and line2!= " " and line1==line2:
			match = true
			file3.write(line1)
			file3.write("\n")
		if line1 == " " or line2 == " " and match == true:
			file3.write("\n")
			match = false
		if line1!=line2:
			match = false