#!/usr/bin/env python3.9

import sys
import re
import itertools
import functools


def read_file(filename: str, sep: str = '\n') -> list[str]:
    with open(filename, 'rt') as f:
        data = f.read().split(sep)
        return data


if __name__ == "__main__":
    if len(sys.argv) == 1:
        print(f'Usage: {sys.argv[0]}  <input>')
        exit(-1)

    data = read_file(sys.argv[1])
    print("--- Challenge 1 ---")


   
    print("--- Challenge 2 ---")
