#include <bits/stdc++.h>
using namespace std;
string s;
int dem, a = 0;
int main()
{
    getline(cin, s);
    for(int a = 0; a < s.size(); a++)
    {
        s[a] = tolower(s[a]);
    }
    while(s.find("toi", a) != -1 && a + 1 < s.size())
    {
        a = s.find("toi", a) + 1;
        dem++;
    }
    cout << dem;
    return 0;
}

$#khanhtaon$

#include <bits/stdc++.h>
using namespace std;
int main() {
string s;
getline(cin, s);
transform(s.begin(), s.end(), s.begin(), ::tolower);
int d=0;
size_t pos =s.find("toi");
 while (pos != string::npos) {
d++;
pos=s.find("toi",pos+1);
}
cout <<d;
return 0;
}