import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        Map<String,Integer> m=new HashMap<>();
        m.put("a",1);
        m.put("b",2);
        m.put("c",3);
        for(Map.Entry<String,Integer> entry:m.entrySet())
            {
                System.out.println(entry.getKey()+" "+entry.getValue());
            }
        m.forEach((key,value)-> m.put(key,value+1));
        for(Map.Entry<String,Integer> entry:m.entrySet())
            {
                System.out.println(entry.getKey()+" "+entry.getValue());
            }
        System.out.println(m.contains("a"));
        System.out.println(m.contains("d"));
        
    }
}