#include <iostream>
#include <vector>
#include <math.h>
using namespace std;
 
int main(){
    string s; 
 
    /*
    python : string itu ya string
	str = "apalah sesuatu"
    
    c++/java/rust : string itu adalah kumpulan char
    				char itu punya behavior yang mirip dengan integer
    				
    str[0]
    */
 
    /*
    s = "institut teknologi bandung";
    
    cout << s.length() << endl;
    cout << s.substr(mulai dari mana, sepanjang apa) << endl;
    cout << s.find("tekno") << endl;
    cout << s.erase(mulai dari mana, sepanjang apa) << endl;
    */
 
    s = "kuku kaki kakekku kaku kaku";
    //             ^    
    //s.find bakal ngasih posisi ditemuinnya dimana
 
    cout << s.find("kak", 15);
}

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

MyAxCjAgMQoxIDEKMTAgMTA=

3 1
0 1
1 1
10 10