import org.apache.commons.lang3.StringUtils;

import java.io.*;
import java.lang.reflect.Array;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class Test {
    public static void main(String[] args) throws IOException {
        FileInputStream fileInputStream = new FileInputStream(new File("src/data.txt"));
        byte[] bbuf = new byte[1024];

        //用于保存实际读取的字节数
        int hasRead = 0;
        //使用循环来重复读取数据
        String content = "";
        while( (hasRead = fileInputStream.read(bbuf)) > 0){

            //将字节数组转换为字符串输出
           //// ////System.out.println("=================");
            //System.out.print(new String(bbuf,0,hasRead));
            content += new String(bbuf,0,hasRead);
        }

        String[] line = content.split("\n");
       // ////System.out.println(line.length);
        Map<String , Integer> map = new HashMap<>();
        List<String> list = new LinkedList<>();


        for (int i = 0; i < line.length; i++) {
           // ////System.out.println("第"+i+"行:"+line[i]);
            String lineStr = line[i];
            String[] nums = lineStr.trim().split(" ");
           // ////System.out.println(nums);
            if (nums.length<=2){
                ////System.out.println(lineStr);
                list.add(lineStr);
            }else{
                List<String> appendList = new LinkedList<>();

                for (int i1 = 0; i1 < nums.length; i1++) {
                    int getNum = Integer.parseInt(nums[i1]);
                    int result = getNum;
                    if(getNum>10000){
                        if (map.get(getNum+"")==null){
                            map.put(getNum+"",getNum);
                        }else{
                            int getMapNum = map.get(getNum+"");
                            result = getMapNum+1;
                            map.put(getNum+"",result);
                        }
                    }

                  //  //System.out.println(result);
                    appendList.add(result+"");
                }
                list.add(StringUtils.join(appendList.toArray(), " ") );
            }
        }
        BufferedWriter out = new BufferedWriter(new FileWriter("src/result.txt"));
        int index = 0 ;
        String all = "";
        //System.out.println(list.size());
        Map<String,String> map1 = new HashMap<>();
        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
            String lineStr = list.get(i);
            String[] nums = lineStr.trim().split(" ");

            for (int i1 = 0; i1 < nums.length-1; i1++) {
                //System.out.println("test::::"+nums[i1]+" "+nums[i1+1]);

                if(map1.get(nums[i1]+" "+nums[i1+1])==null){
                    index++;
                    all+=nums[i1]+" "+nums[i1+1]+"\n";
                }
                map1.put(nums[i1]+" "+nums[i1+1],nums[i1]+" "+nums[i1+1]+"\n");


            }
        }
        //System.out.println("2341234123421341234");
        //System.out.println(all);
        out.write(all);
        out.close();
        //把 //System.out.println(line);
        //改成bai
        //System.out.println(index);

        //关闭文件输出流，放在finally块里更安全
        fileInputStream.close();
    }
}