Returns the specified problem answer in the form 
         problem: problem id
         Returns string, or bytes if a file is loaded

def get_input(problem):
    """" Returns the specified problem answer in the form 
         problem: problem id
         Returns string, or bytes if a file is loaded
    """
    input_data = load_input()
    pbsplit = problem.split(":")
    problem_input = input_data['input'][pbsplit[0]]
    if isinstance(problem_input, dict) and "filename" in problem_input and "value" in problem_input:
        if len(pbsplit) > 1 and pbsplit[1] == 'filename':
            return problem_input["filename"]
        else:
            return open(problem_input["value"], 'rb').read()
    else:
        return problem_input