Program
#include <bits/stdc++.h>
using namespace std;
int main() {
int T, D, C;
cin >> T;
while (T--)
{
C = 0;
cin >> D;
while (D > 0)
{
if (D % 10 == 4) C++;
D /= 10;
}
cout << C << '\n';
}
return 0;
}