def convert_coord(coord):
    """
    Converts coordinate tuple to format required for output
    """
    col_dictionary = {0:"a", 1:"b", 2:"c", 3:"d", 4:"e", 5:"f", 6:"g", 7:"h"}
    row = str(8 - coord[0])
    column = str(col_dictionary[coord[1]])
    position = column + row
    return position