item 20 successfully inserted
item -23 successfully inserted
item 90 successfully inserted
item 60 successfully inserted
item 12 not found
item 12 successfuly inserted
item 12 found
max item 90 deleted
item 76 not present
item 12 already present
item 60 successfully deleted
max item 20 deleted
item 20 not found
item 12 successfully deleted
max item -23 deleted