import java.lang.Integer;
import java.lang.Object;
import java.lang.Float;
import java.lang.String;

public record Rec(String a,  String b) {}

public class test extends String{
}


public class SwitchInfered {
    public main(o) {
        return switch (o) {
        case Rec(a, b) -> a;
        case Integer i -> i+1;
        default -> 0;
        };
    }
}