#include<iostream>
using namespace std;

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