import java.util.*;

class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	int input = sc.nextInt();
      	int mod = 0;
       	while(input != 0){
        	mod = input % 10;
          	if(mod == 7){
              System.out.println("Yes");
              return;
            }
          	input = input / 10;
        }
        if(input % 10 == 7){
           System.out.println("Yes");
           return;
        }
      	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