1t=int(input())
2a=str(4)
3for i in range(t):
4 x=str(input())
5 count=0
6 for j in x:
7 if j==a:
8 count=count+1
9 print(count)
1#include <iostream>
2using namespace std;
3
4int main() {
5 // your code goes here
6 int t,number,count,rem;
7 std::cin >> t;
8
9 for (int i = 0; i < t; i++) {
10 cin >> number;
11 while(number != 0){
12 rem = number % 10;
13 if (rem == 4){
14 count++;
15 }
16 number /= 10;
17 }
18 std::cout << count << std::endl;
19 count = 0;
20 }
21 return 0;
22}