open(ORIGINALNAMES,"./OriginalNames.txt"); # Eg. Jupiter Mars Earth etc.
@originalNames = <ORIGINALNAMES>;

open(ALTERNATENAMES,"./AlternateNames.txt"); # Eg. Host1 Host2 Host3 etc.
@alternateNames = <ALTERNATENAMES>;

open(LOG,"./log.txt") or die; ## Log file containing names wanting to be replaced eg. Jupiter Mars Earth etc. 
@log = <LOG>;
chomp @log;

## Should I do a for 
for($i = 0; $i<=$#log; $i++)
{
### Not sure how to proceed to loop through log file, find the original names and then substitute with the Alternate Names..  
}