import java.util.Scanner;

public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String N = sc.next();
	boolean result = false;
	for(int i=0;i<3;i++){
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	}
	if(result) System.out.print("Yes");
	else System.out.print("No");
    }
} import java.util.Scanner; Scanner java.util public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String N = sc.next();
	boolean result = false;
	for(int i=0;i<3;i++){
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	}
	if(result) System.out.print("Yes");
	else System.out.print("No");
    }
} Main public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String N = sc.next();
	boolean result = false;
	for(int i=0;i<3;i++){
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	}
	if(result) System.out.print("Yes");
	else System.out.print("No");
    } main {
	Scanner sc = new Scanner(System.in);
	String N = sc.next();
	boolean result = false;
	for(int i=0;i<3;i++){
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	}
	if(result) System.out.print("Yes");
	else System.out.print("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String N = sc.next(); N sc.next() sc.next sc boolean result = false; result false for(int i=0;i<3;i++){
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	} int i=0; int i=0; i 0 i<3 i 3 i++ i++ i {
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	} {
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	} if(Character.getNumericValue(N.charAt(i)) == 7) result = true; Character.getNumericValue(N.charAt(i)) == 7 Character.getNumericValue(N.charAt(i)) Character.getNumericValue Character N.charAt(i) N.charAt N i 7 result = true result true if(result) System.out.print("Yes");
	else System.out.print("No"); result System.out.print("Yes") System.out.print System.out System System.out "Yes" System.out.print("No") System.out.print System.out System System.out "No" String[] args args public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String N = sc.next();
	boolean result = false;
	for(int i=0;i<3;i++){
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	}
	if(result) System.out.print("Yes");
	else System.out.print("No");
    }
} public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String N = sc.next();
	boolean result = false;
	for(int i=0;i<3;i++){
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	}
	if(result) System.out.print("Yes");
	else System.out.print("No");
    }
} Main
import java.util.Scanner;

public class Main{
    public static void main(String[] args){
	Scanner sc = new Scanner(System.in);
	String N = sc.next();
	boolean result = false;
	for(int i=0;i<3;i++){
	    if(Character.getNumericValue(N.charAt(i)) == 7) result = true;
	}
	if(result) System.out.print("Yes");
	else System.out.print("No");
    }
}