1. Similar to finding a missing number from an array 2. Finding a session with a maximum no.of valid commands(Ex. start sessionA, command1,command2,command1, command3 start sessionB, command1,command2,command1, command3 start sessionA, command1,command23,command11, command3 start sessionC, command1,command2,command1, command3) 3. Print lines in a tabloid format(you need to make sure that long lines are split as per given width) 4. Common recurring folder path (/a/folder1/folder12/file.txt, /a/folder1/folder13/file.txt, /a/folder2/folder12/file.txt, /a/folder3/folder12/file.txt, /a/folder1/folder12/file23.txt, /b/folder1/folder13/file.txt, /b/folder2/folder12/file.txt, /c/folder3/folder12/file.txt..etc)