if condition_1:
    statement_1()
else:
    if condition_2:
        statement_2()
    else:
        if condition_3:
            statement_3()
        else:
            if condition_4:
                statement_4()
            else:
                if condition_5:
                    statement_5()
                else:
                    if condition_6:
                        statement_6()
                    else:
                        if condition_7:
                            statement_7()
                        else:
                            if condition_8:
                                statement_8()
                            else:
                                if condition_9:
                                    statement_9()