1.ll 25 2.pl 20 3.nf 4file1 and file2 #1 5.mc | 6file2 only 7file2 only 8.mc 9file1 and file2 #2 10.mc + 11file2 only 12.mc 13file1 and file2 #3 14.mc * 15.mc 16file1 and file2 #4 17file1 and file2 #5 18