#include <bits/stdc++.h>
#define fastio() ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;

#define int long long

void solve() {
    string s; cin>>s;
    string ss= "codeforces";
    int cnt=0;

    for(int i=0;i<s.size();i++){
        if(s[i]!=ss[i])cnt++;
    }

    cout<<cnt<<"\n";

}


signed main() {
    fastio();
    
    int t=1;
    cin>>t;
    while (t--)
    {
        solve();
    }

    return 0;
}