機械の総合病院 [MISSION LEVEL: C]

#include <bits/stdc++.h>
#define _for(i,a,b) for(int i = (a);i < (b);i ++)
#define pb push_back
using namespace std;

int main()
{
    string s;
    cin >> s;
        if(s.size()<6){
            cout << "Invalid";return 0;
        }
        int f1 = 0,f2 = 0;
        _for(i,0,s.size())
        {
            if(isdigit(s[i]))
                f1 = 1;
            else if(isalpha(s[i]))
                f2 = 1;
        }
        if((!f1)||(!f2)){
            cout << "Invalid";return 0;
        }
        _for(i,0,s.size()-2)
        if(tolower(s[i])==tolower(s[i+1])&& tolower(s[i])==tolower(s[i+2]))
        {
            cout << "Invalid";return 0;
        }
        cout << "Valid";
    return 0;
}