/*Demonstrasi karakter dan string */

#include <stdio.h>
#include <iostream>
#include <string.h>
using namespace std;

int main() {
	string str;
	cin >> str;
	for(int i = 0; i < str.length(); i++)
	    str[i] = tolower(str[i]);
	   
	cout << str << '\n';
}