//lineno.java  --- by tsaiwn@csie.nctu.edu.tw
// javac lineno.java
// java lineno < file.name
// java lineno < file.name > file.txt
import java.io.*;
import java.util.*;
class lineno {
    static PrintStream cout = System.out;
    static BufferedReader br = new BufferedReader(
                            new InputStreamReader(System.in) );
    public static void main(String xxx[ ]) throws Exception {
        String s;
        int n = 0;
        s = br.readLine( );
        while(s != null) {     // Java 要改為這樣
        //while( ! br.eof() ) {   // 因 Java 的 BufferReader 沒有 eof( ) 可用
             ++n;
             cout.printf("%5d %s\r\n", n, s);   // for DOS/Windows
             s = br.readLine( );
         } // while
         cout.printf("\r\n");   // remove "\r" on Unix system
     } // main
}