Note that two stores are tied for shortest distance from house2.

                        Each House and the Closest Store                       1

                                    Closest
                          House     Store     Distance
                          ----------------------------
                          house1    store1        4.00
                          house2    store2        2.00
                          house2    store3        2.00
                          house3    store3        2.24
                          house4    store4        2.00