avocado> db.five.save({ doc : 1 })
"5961858:7207042"
avocado> db.five.save({ doc : 2 });
"5961858:7272578"
avocado> db.five.save({ doc : 3 });
"5961858:7338114"
avocado> db.five.save({ doc : 4 });
"5961858:7403650"
avocado> db.five.save({ doc : 5 });
"5961858:7469186"

avocado> db.five.all();
{ "doc" : 2, "_id" : "5961858:7272578" }
{ "doc" : 4, "_id" : "5961858:7403650" }
{ "doc" : 3, "_id" : "5961858:7338114" }
{ "doc" : 1, "_id" : "5961858:7207042" }
{ "doc" : 5, "_id" : "5961858:7469186" }