[ewmayer]

*********|*********|*********|*********|*********|*********|*********|*********|
*                                                                              *
*                                                                              *
*                                                                              *
*.......................................                   A                   *
*                                      .                                       *
*                                      .                                       *
*                                      .                                       *
*                                      .                                       *
*                  B                   ........................................*
*                                                                              *
*                                                                              *
*                                                                              *
*                                                                              *
*********|*********|*********|*********|*********|*********|*********|*********|

Then slide piece A 4m rightward and 1m down.