What is the output of the following program?

#include

#include

using namespace std;

int main()

{

string str1 = "Amusement Park";

string str2 = "Going to";

string str3 = "the";

string str;

cout << str2 + " "+ str3 + " " + str1 << endl;

cout << str1.length() << endl;

cout << str1.find("P") << endl;

cout << str1.substr(1, 5) << endl;

str = "ABCDEFGHIJK";

cout << str << endl;

cout << str.length() << endl;

str[0] = "a";

str[2] = "d";

cout << str << endl;

return 0;

}