import java.io.*;
class abhi
{
public static void main(String args[])throws IOException
{
DataInputStream d=new DataInputStream (System.in);
int i,as,l;
String na;
na=d.readLine() ;
l=na.length();
char ch;
for(i=0;i<l;i++ )
{
ch=na.charAt(i) ;
as=(int)ch;
if(as>=48&&as<= 57)
System.out.prin tln(ch);
}
}
}