class Pair<U, T> {
    U a;
    T b;
    Pair(U x, T y) {
        a = x; b = y;
    }
}

class Complex {
    m(b) {
        var c = b;
        var d = c;
        var e;
        d = e;
        var r1 = e;
        var f = e;
        var g;
        f = g;
        var r2 = g;
        return new Pair<>(r1, r2);
    }
}