We have a plain-text data file named stuff.txt in which each…
We have a plain-text data file named stuff.txt in which each line: starts with a first name, of variable length, but containing no spaces, followed by a single space separator, followed by a last name (structured like the first name above), followed by another single space separator, followed by a 9-digit long numerical ID, followed by yet another single space separator, and finally a variable-length single word representing a password. Provide one single command line (not multiple commands separated by ‘;’) that will display how many unique ID numbers are in the file. We cannot assume that each ID appears only a single time.