#include <iostream>
using namespace std;
int main() {
    long long side1, side2, side3;
    
    if(cin >> side1 >> side2 >> side3 ) {
        
        if((side1 + side2 > side2) &&
            (side2 + side3 > side1) &&
            (side 1 + side3 > side2)) {
            cout << "Valid" << endl;
            } else {
                cout << "Invalid" << endl;
            }   
    }
    return 0;
}