from typing import Tuple


def determine_rep(heads, tails) -> Tuple[str, str]:
    """Determine single-character representations of each binary value

    Parameters
    ----------
    heads: ``Face``
        The ``1`` abstraction
    tails: ``Face``
        The ``0`` abstraction

    Returns
    -------
    heads_rep : ``str``
        Character representation of the ``heads``
    tails_rep : ``str``
        Character representation of the ``tails``
    """
    heads_rep = str(heads)[0]
    tails_rep = str(tails)[0]
    if heads_rep == tails_rep:
        heads_rep = "1"
        tails_rep = "0"

    return heads_rep, tails_rep