import java.io.*;
import java.util.*;
import java.util.stream.*;

// 処理
class Process {
    private int[] A;
    private int[] B;
    private int[] C;

    Process(int[] A, int[] B, int[] C) {
        this.A = A;
        this.B = B;
        this.C = C;
    }

    String getResult() {
        if(A[1] < A[0]) {
            return "YES";
        }

        if(A[1] > A[0]) {
            return "NO";
        }
        
        // 以下、 A が同じ
        if(B[1] < B[0]) {
            return "YES";
        }
        
        if(B[1] > B[0]) {
            return "NO";
        }
        
        // 以下、 B が同じ
        if(C[1] < C[0]) {
            return "YES";
        }
        
        if(C[1] > C[0]) {
            return "NO";
        }
        
        // 同じバージョン
        return "YES";
    }
}

public class Main {
    public static void main(String[] args) throws IOException {
        var bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        var printWriter    = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));

        // 入力
        var A = new int[2];
        var B = new int[2];
        var C = new int[2];
        for(int i = 0; i < 2; i++) {
            int[] input = Stream.of(bufferedReader.readLine().trim().split("\\.")).mapToInt(Integer::parseInt).toArray();
            A[i] = input[0];
            B[i] = input[1];
            C[i] = input[2];
            
        }

        // 出力
        printWriter.println((new Process(A, B, C)).getResult());

        bufferedReader.close();
        printWriter.close();
    }
}