#include <iostream>
#include <algorithm>
#include <cstdio>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <memory.h>
#include <sstream>
#include <cmath>
#include <ctime>
 
using namespace std;
void solve() {
    int n;
    scanf("%d", &n);
    int ans = 0;
    while (n > 0) {
        if (n % 10 == 4) ans++;
        n /= 10;
    }
    printf("%d\n", ans);
}
int main() {
    //freopen("input.txt", "r", stdin);
    int t;
    cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}