A body stretching apparatus for stretching and strengthening muscles in the legs of the user. In the middle portion of the glass substrate, a substantially rectangular touch area is provided. The position of the icon specifies a value of the search criteria. The system also includes a synchronous message transceiver communicatively coupled to the asynchronous message receiver and configured to synchronously communicate with the data source by sending a synchronous request message to the data source and receiving a synchronous response message from the data source in return. The first router also includes an interface card that transmits, to a second router of a second area of the network, an advertisement that advertises a summarized version of the mapping between the contiguous set of labels and the first area addresses.