#include<iostream>
#include<cstring>
#include<string>
using namespace std;
 
const int MAX_SIZE = 2001;
 
int main() {
	char str[201][201];
	string str_aux[201];
	int line = 0;
	while (!cin.eof()) {
		cin.getline(str[line], 101);
		++line;
	}
	for (int i = 0; i <= line; ++i) {
		int length = strlen(str[i]);
		for (int element = 0; element < length; ++element) {
			if (str[i][element] >= 'A' && str[i][element] <= 'A') {
				int aux = str[i][element];
				aux += 32;
 
				str[i][element] = aux;
				cout << aux << "\n";
			}
		}
	}
	return 0;
}

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