Execute, when user call turingmarkov.

def main(argv, stdin, stdout):
    """Execute, when user call turingmarkov."""
    if len(argv) > 1 and argv[1:3] == ["compile", "markov"]:
        algo = load_markov(argv, stdin)
        print(algo.compile(), file=stdout)
    elif len(argv) == 4 and argv[1:3] == ["run", "markov"]:
        algo = load_markov(argv, stdin)
        for line in stdin:
            print(algo.execute(''.join(line.split())), file=stdout)

    elif len(argv) > 1 and argv[1:3] == ["compile", "turing"]:
        machine = load_turing(argv, stdin)
        print(machine.compile(), file=stdout)
    elif len(argv) == 4 and argv[1:3] == ["run", "turing"]:
        machine = load_turing(argv, stdin)
        for line in stdin:
            print(machine.execute(line), file=stdout)

    elif len(argv) == 2 and argv[1] == "test":
        path = os.path.abspath(os.path.dirname(__file__))
        argv[1] = path
        pytest.main()
    elif len(argv) == 2 and argv[1] == "version":
        print("TuringMarkov", VERSION, file=stdout)

    else:
        print(USAGE, file=stdout)
        if not (len(argv) == 2 and argv[1] == "help"):
            exit(1)