Three friends have a total of 6 identical pencils, and each one has at least one pencil. In how many ways can this happen?<spanclass=′latex−bold′>(A)</span>1<spanclass=′latex−bold′>(B)</span>3<spanclass=′latex−bold′>(C)</span>6<spanclass=′latex−bold′>(D)</span>10<spanclass=′latex−bold′>(E)</span>12