def METHOD_NAME (ch):
    """Return name of cell used to store character data"""
    prefix = 'font_'
    if (ord(ch) < 0x100):
        cellname = '{:02X}'.format(ord(ch))
    elif (ord(ch) < 0x10000):
        cellname = '{:04X}'.format(ord(ch))
    elif (ord(ch) < 0x1000000):
        cellname = '{:06X}'.format(ord(ch))
    else:
        cellname = '{:X}'.format(ord(ch))
    return prefix + cellname