///////    Lowercase.java    ///////
import java.io.*;

class Lowercase
{
    public static void main(String[] args)
        throws IOException
    {  int i;  char c;
       InputStreamReader in = new InputStreamReader(System.in);
       OutputStreamWriter out = new OutputStreamWriter(System.out);
       while ( (i = in.read()) != -1 )  // input char
       {    c = Character.toLowerCase( (char) i);
            out.write(c);
       }
       out.close();
    }
}