Write a program called "namesort". "namesort" takes two arguments. The first argument is the name of a file that consists of lines with names in the format "first-name last-name" with a single space as separator. The second argument is the name of a file to contain the namesort's output.

Namesor's job is to output just the last-name in sorted order. No duplicate suprpression is done. The program should use the system sort program to do the actual sorting using as few processes as possible.

Your code should not test extensively for error conditions or include header files, but do use enough comments to make the program understandable