Error Handling Learning Mode

Given the following function ...

    function doSomething($a,$b){
        return $a/$b;
    }

    try {
        doSomething(1);
    } catch (Exception $ex) {
        echo 1;
    } catch (ArgumentCountError $ace) {
        echo 2;
    } catch (DivisionByZeroError $dbze) {
        echo 3;
    }

what will be the output after the code runs?
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