import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int[] numArray = new int[10];
        String str = "No";
        Map<Integer,Integer> numMap = new HashMap<>();
        while(sc.hasNext()){
            int N = Integer.parseInt(sc.next());
            numArray[N]++;
        }
        for(int i=1;i<10;i++){
            if(numArray[i] == 2)str = "Yes";
        }
        System.out.println(str);
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz