w1 = tf.get_variable("w1", [INPUT_SIZE, HIDDEN_SIZE], initializer=tf.random_normal_initializer())
b1 = tf.get_variable("b1", [HIDDEN_SIZE])
w2 = tf.get_variable("w2", [HIDDEN_SIZE, OUTPUT_SIZE], initializer=tf.random_normal_initializer())
b2 = tf.get_variable("b2", [OUTPUT_SIZE])