#include <bits/stdc++.h>
using namespace std;
int main() {
int t;
cin >> t;
while(t--)
{
string s;
cin >> s;
string p = "codeforces";
int c=0;
for(int i=0;i<10;i++)
{
if(p[i]!=s[i])
{
c++;
}
}
cout << c << endl;
}
return 0;
}
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