#include <iostream>
using namespace std;


#include <string>

int main() {

    string sentence="I am a elephant";
    int pos;
    string animal_1="elephant";
    string animal_2="cat";
    int last_char;

    cout << sentence << endl;

    cout << "The sentence is " << sentence.length() << " characters long." << endl;

    pos=sentence.find(animal_1);

    cout << pos << endl;

    sentence.replace(pos,animal_2.length(),animal_2);

    last_char=sentence.length()-1;

    //sentence.erase(10,5);
    int chop_mark=pos+animal_2.length();
    int end_of_sentence=sentence.length()-1;
    sentence.erase(chop_mark,end_of_sentence-chop_mark+1);
    cout << sentence << endl;

    cout << "The sentence is " << sentence.length() << " characters long." << endl;

    cout << sentence << endl;

}