import java.util.List;

class Main {

    void fooExtends(List<? extends String> list) {
        var x = list.get(0);
        x = "";
        var y = list;
        y.add<error descr="'add(capture<? extends java.lang.String>)' in 'java.util.List' cannot be applied to '(java.lang.String)'">("")</error>;
    }
    
    void fooSuper(List<? super String> list) {
        var x = list.get(0);
        x = "";
        var y = list;
        y.add("");
    }
    
    void fooX(X<? extends String, String> x) {
        var v = x;
        v.add<error descr="'add(capture<? extends java.lang.String>)' in 'X' cannot be applied to '(java.lang.String)'">("")</error>;

        var e = x.get();
        e = "";
    }
    
    void fooXArray(X<? extends String, String> x) {
        var v = m(x.get());
        String s = v[1];
        v[1] = s;

        var e = m(x);
        e[0].add<error descr="'add(capture<? extends java.lang.String>)' in 'X' cannot be applied to '(java.lang.String)'">("")</error>;
    }


    <M> M[] m(M m) {
        return null;
    }
}

abstract class X<T extends S, S> {
    abstract T get();
    abstract void add(T t);
}