def METHOD_NAME(input):
    channel_axis = -1
    r1 = conv_block(input, 192, 1, 1)
    r1 = conv_block(r1, 192, 3, 3, subsample=(2, 2), border_mode='valid')
    r2 = conv_block(input, 256, 1, 1)
    r2 = conv_block(r2, 256, 1, 7)
    r2 = conv_block(r2, 320, 7, 1)
    r2 = conv_block(r2, 320, 3, 3, subsample=(2, 2), border_mode='valid')
    r3 = MaxPooling2D((3, 3), strides=(2, 2), padding='valid')(input)
    m = concatenate([r1, r2, r3], axis=channel_axis)
    return m