#include<iostream>
using namespace std;
int main(){
		string haystack = "leetcode" ;
		string needle = "leeto";
        bool valid = false;
        for(int i =0, j=0; i<haystack.length(); i++,j++){
            if(haystack[i]==needle[j] && needle[j] != '\0'){
                valid = true;             
            }
            if(needle[j] =='\0'){
                cout <<i -j;
                return 0;	
            }
        }
        cout<< "-1"; 
}

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NDU=

45