tijie

#include<bits/stdc++.h>
using namespace std;
int main(){
    string a;
    cin>>a;
    int cnt=0,num=0,sum=0;
    for(int i=0;i<a.size();i++){
        if(a[i]=='c') cnt++;
        else if(a[i]=='p') num++;
        else if(a[i]=='d') sum++;
    }int qwe=0;
    for(;cnt!=0&&sum!=0&&num!=0&&sum>1;){
        qwe++;
        cnt-=1;
        num-=1;
        sum-=2;
    }
    cout<<qwe;
    return 0;
}