import tensorflow as tf

    # ------------------------------------------------------
    # step3: Let's get serious and build the neural network
    # ------------------------------------------------------
    # [none, 128, 9]
    X = tf.placeholder(tf.float32, [None, config.n_steps, config.n_inputs])
    # [none, 6]
    Y = tf.placeholder(tf.float32, [None, config.n_classes])

