This problem is better solved with a hash structure.

The algorithm would be:

• Open the file
• In a loop, read the input
• chomp, then split the input on white space
• use the last field as a hash key, and "push" the first field into the HOA (Hash-of-Arrays) structure (Please research HOA at this site)
• End loop (Keep reading till you have all info)
• Loop through the collected hash structure, and print the info

Let us know if you have a specific issue with your implementation of this algorithm.

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