def increment_ctr(ctr):
    """
    Increments one the counter.

    Parameters
    ----------

    ctr : string
        Counter

    Returns
    -------

    incremented_counter : string
        Incremented Counter
    """
    ctr_inc_int = int.from_bytes(bytes.fromhex(ctr), byteorder="big") + 1
    return bytes.hex(ctr_inc_int.to_bytes(length=16, byteorder="big"))