<image>Paulo took a rectangular sheet of paper, yellow on one side and green on the other side and, with several folds shown in the dotted lines in the figure below, made a little paper plane. To give the airplane a charm, Paulo made a circular hole, marked on the last figure.
<image1>
After playing a lot with the plane, Paulo unfolded the sheet and realized that there were several holes in it. How many holes did he count?