#include<iostream>
using namespace std;

int main() {
    long long side 1,side 2,side 3;
    cin>>side 1>>side 2>>side 3;
    
    if(side 1+side 2>side 3 &&
       side 1+side 3>side 2 &&
       side 2+side 3>side 1) {
       cout<<"Valid";
    }else{
        cout<<"Invalid";
    }
     return 0;
}