Check if the last character of the given string coincides with e, append an appropriate string to \(S\), and print it.

Sample code (Python)

In Python, s[-1] yields the last character of s. This is applicable to other data structures, like a list.

s = input()

if s[-1] == 'e':
	t = s + "r"
else:
	t = s + "er"

print(t)

Sample code (C++)

In C++, s.back() yields the last character of s. This is applicable to other structures, like a vector.

#include <iostream>
using std::cin;
using std::cout;
#include <string>
using std::string;


int main (void) {
	string s;
	cin >> s;

	string t;
	if (s.back() == 'e') {
		t = s + "r";
	} else {
		t = s + "er";
	}

	cout << t << "\n";


	return 0;
}