I PREFER CODE IN C,C++, OR PYTHON

Consider the "Even-Less-Simple-Substitution" cipher. Write a program (using a programming language of your choice) that can cryptanalyze this cipher. Your program should take a ciphertext input in the form of a file, and figure out the key and output the plaintext(s) in the form of another file. This could be accomplished in a semi-automated manner (i.e., a human can guide your program by providing some suggestions at runtime). You can use any resource you need (programming libraries, English dictionary etc.) to accomplish this task. Demonstrate that your technique works for different ciphertext input files