Find a character for a given structure.

def character_from_structure(motivation):
    """Find a character for a given structure."""
    assert len(motivation) == 3

    _c = {
            "+": "⿰",
            "-": "⿱",
            '>': "⿱",
            "手": "扌",
            "人": "亻",
            "刀": "刂",
            "丝": "糹",
            "水": "氵",
            "0": "⿴",
            }
    structure = ''.join([_c.get(x, x) for x in motivation])
    return _cd.IDS.get(structure, '?')