def get_suffix_side(node, matcher):
    """Check if (not) adding char node to right syllable would cause creating word suffix.
    Return 1 if char node should be added to right,
    -1 if to left,
    0 if cannot determine."""
    if node.next.syllable is None or node.next.syllable.is_last() is False:
        return 0
    left_score = matcher.is_suffix(str(node.next.syllable))
    right_score = matcher.is_suffix(str(node) + str(node.next.syllable))
    return right_score - left_score