#include<bits/stdc++.h>
typedef long long ll, LL;
using namespace std;
#define pb push_back

void solve() {
	string s1, s2 = "codeforces";
	int ans = 0;
	cin >> s1;
	for(int i = 0; i < 10; i++) {
		if(s1[i] != s2[i]) ans++;
	}
	cout << ans << endl;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	
	int t = 1;
	cin >> t;
    while(t--) {
    	solve();
	}
	
	return 0;
}