public class Strings {
    public static fun foo() : java.lang.String {
        var s1: java.lang.String = "Hello "
        var s2: java.lang.String = s1 + "wounderful"
        var s3: java.lang.String = " world "
        var s4: java.lang.String = s2 + s3
        var s5: java.lang.String = s4 + 2016
        var empty: java.lang.String = ""
        return s5
    }
}
