import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      
      int i = 0;
      
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      
      if(a==7){
        i++;
      }
            if(b==7){
        i++;
      }
            if(c==7){
        i++;
      }
      
      if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      }
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      
      int i = 0;
      
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      
      if(a==7){
        i++;
      }
            if(b==7){
        i++;
      }
            if(c==7){
        i++;
      }
      
      if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      }
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      
      int i = 0;
      
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      
      if(a==7){
        i++;
      }
            if(b==7){
        i++;
      }
            if(c==7){
        i++;
      }
      
      if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      }
	} main {
		Scanner sc = new Scanner(System.in);
      
      int i = 0;
      
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      
      if(a==7){
        i++;
      }
            if(b==7){
        i++;
      }
            if(c==7){
        i++;
      }
      
      if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      }
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int i = 0; i 0 int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc if(a==7){
        i++;
      } a==7 a 7 {
        i++;
      } i++ i if(b==7){
        i++;
      } b==7 b 7 {
        i++;
      } i++ i if(c==7){
        i++;
      } c==7 c 7 {
        i++;
      } i++ i if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      } i == 1 i 1 {
        System.out.println("YES");
      } System.out.println("YES") System.out.println System.out System System.out "YES" {
        System.out.println("NO");
      } System.out.println("NO") System.out.println System.out System System.out "NO" String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      
      int i = 0;
      
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      
      if(a==7){
        i++;
      }
            if(b==7){
        i++;
      }
            if(c==7){
        i++;
      }
      
      if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      }
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      
      int i = 0;
      
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      
      if(a==7){
        i++;
      }
            if(b==7){
        i++;
      }
            if(c==7){
        i++;
      }
      
      if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      }
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      
      int i = 0;
      
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      
      if(a==7){
        i++;
      }
            if(b==7){
        i++;
      }
            if(c==7){
        i++;
      }
      
      if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      }
	}
}
