Andrew and COVID
#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int main() {
/* Enter your code here. Read input from STDIN. Print output to STDOUT */
string s;
getline(cin,s);
unsigned i;
int counter=0;
for(i=0;i<s.length();i++){
if(s[i]=='c'||s[i]=='o'||s[i]=='v'||s[i]=='i'||s[i]=='d'){
counter++;
}
}
cout<<counter/5<<endl;
return 0;
}