       popd [ +-n ]
              Removes entries from the directory stack.  With  no
              arguments,  removes  the  top  directory  from  the
              stack, and performs a cd to the new top  directory.
              With  an  argument  of  the form +n, remove the nth
              entry counting from the left of the list  shown  by
              the dirs command, starting with zero, and change to
              that directory.  With an argument of the  form  -n,
              remove  the  nth entry counting from the right.  If
              the PUSHD_MINUS option is set, the  meanings  of  +
              and - in this context are swapped.
