#include <iostream>
using namespace std;
int main() {
    string s;
    cin >> s;
    if(s.size() == 19 && s[4] =='-' && s[9] =='-' && s[14] =='-'){
        for(int i=0;i<19;i++)
        if(i!=4 && i!=9 && i!=14 && !((s[i]>='A'&7s[i]<='Z')||(s[i]>='0'&&s[i]<='9')))
        return cout <<"Invalid",0;
        cout << "Valid";
     }
     else
     cout << "Invalid";
}