import java.util.function.Predicate;
public class Main {
public static void main(String[] args) {
Predicate<String> a = (input) -> input.contains("a");
Predicate<String> b = (input) -> input.contains("b");
System.out.println("test ac:" + a.or(b).test("ac"));
System.out.println("test bc:" + a.or(b).test("bc"));
System.out.println("test de:" + a.or(b).test("de"));
}
}