check xem xau "python" co xuat hien dung thu tu trong xau s hay khong, bat chap do dai xau s la bao

#include<bits/stdc++.h>
using namespace std;

void lowlize(string & s){
    for (int i=0;i<s.size();i++){
        if ( isalpha(s[i])){
            s[i]=tolower(s[i]);
        }
    }
}

int main(){
    string s;
    cin>> s;

    string destination = "python";
    int start = 0 ;
    int countReplace = 0 ;

        for (int i=0;i<destination.size();i++){
            for (int j=start ;j<s.size();j++){
                if ( destination[i] == s[j]){
                    start= j+1;
                    destination[i]=' ';
                    s[j]=' ';
                    countReplace ++ ;
                    break;
                }
            }
        }

        if (countReplace == destination.size() ){
            cout<<"YES";
        }
        else cout<<"NO";


    return 0;
}