#include <string>
#include <iostream>

using namespace std;

int main () {
    string sub;
    string pat="Hello World, how are you today?";

    sub = pat.substr(6,0);
    cout << "Sub is |"<< sub << "|" << endl;

    sub = pat.substr(6,1);
    cout << "Sub is |"<< sub << "|" << endl;

    sub = pat.substr(6,5);
    cout << "Sub is |"<< sub << "|" << endl;

    return(0);
}