#include<iostream>
using namespace std;
int main()
{
    int side1=10,side2=5,side3=9;
    if (side1+side2 > side3 && side1+side3 > side2 && side2+side3> side1)
    {
        cout<<"valid"<<endl;
    }
    else
    {
        cout<<"Invalid"<<emdl;
    }
}