import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int m=0;
		for(int i = 0;i<3;i++){
			if((N%10)!=7){
				N = (N-(N%10))/10;
				m++;
			}			
		else{
    		System.out.println("Yes");
			break;
        }
		if(m==3){
			System.out.println("No");
		}
		}
		}
	}
/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