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Parse a log files and get sorted list of resources usage per key Keys File structure (log file names to key mapping) Log1 key1 Log2 key2 Log3 key3 ............... Log file structure (content of the log file mapping of resourses and return codes): Resource 1 200 Resource 2 403 Resource 3 500 Resource 1 201 ................ The result should be ordered list of Key2 , resource1, 230 Key3, resource 2, 205 ............