There are few items which we have to put items in boxes.if 3
items put in each box,1 item left outside.if 4 items put in
each box,1 item left outside.if 5 items put in each box,1
item left outside.if 6 items put in each box,1 item left
outside.if 7 items put in each box,0 item left outside.how
many number of item are there?