 EXHIBIT [CHANGED][NAMED] [position-spec] [ERASE] {identifier-1 | literal-1} ...
 ~~~~~~~  ~~~~~~~  ~~~~~                   ~~~~~
         [UPON mnemonic-name-1]
          ~~~~

 where position-spec is

   {(position-spec-num, position-spec-num)}
   {(, position-spec-num)                 }
   {(position-spec-num, )                 }

 where position-spec-num is

   {identifier-2} [{+} integer-2]
   {integer-1   } [{-}          ]
