import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.math.BigInteger;


public class BigNumbers {

    public static void main(String[] args) throws Exception {
        BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while ((line=stdin.readLine())!=null) {
            BigInteger bi = new BigInteger(line);
            if(line.equals("0")) break;
            BigInteger v[] = bi.divideAndRemainder(new BigInteger("10"));
            System.out.println(v[0] + "  " + v[1]);
        }
    }

}