#include<iostream>
using namespace std;

int main (){
    int slide1, slide2, slide3;
    cin >> side1, >> side2 >> side3;
    if ((side1 + side2 > side3;) &&
    (side2 + slide3 > slide1) &&
    (slide1 + skide3 > slide2)) {
        cout << "Valid";
        
    }else{
        cout <<"Invalid";
        
    }retun0;
}