bash-2.01$ ./boxworld -?
usage: ./boxworld [-b box-count]
                  [-c city-count]
                  [-dc drive-cost]
                  [-fc fly-cost]
                  [-dr delivery-reward]
                  [-tlc truck-load-cost]
                  [-tuc truck-unload-cost]
                  [-plc plane-load-cost]
                  [-puc plane-unload-cost]
                  [-gr goal-reward]
                  [-pn problem name]
                  [-dn domain name]
