dirs [ -v ] [ arg ... ]
       With  no  arguments,  print the contents of the directory stack.
       If the -v option is given, number the directories in  the  stack
       when  printing.   Directories  are  added to this stack with the
       pushd command, and removed with the cd  or  popd  commands.   If
       arguments  are  specified,  load  them onto the directory stack,
       replacing anything that was there, and push the  current  direc-
       tory onto the stack.
