It's hard to tell what you're doing from the code you've posted, but I know that if I'm using excel the old fashioned way (manually) and want numbers entered as is, I put a single quote in front of them.

$/  =  q#(\w)#  ;  sub  sig { print scalar reverse  join  ' ',  @_  } 
+ sig
map { s$\$/\$/$\$2\$1$g && $_ } split( ' ', ",erckha rlPe erthnoa stJu
+" );
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