import java.util.function.*;
class RandomOTP {
public static void main(String[] args) {
Supplier<String> s = () -> {
String otp = " ";
for (int i = 0; i < 6; i++) {
otp = otp + (int) (Math.random() * 10);
}
return otp;
};
System.out.println(s.get());
}
}
