
	


import java.util.*; 
	public class Main {
	public static void main( String[] args) {			
					
					Scanner in = new Scanner(System.in);
					String a = in.next();
					int l = a.length();
					int flag =0;
					for(int i = 0;i<l;i++) {
						if(a.charAt(i)=='7') {
							flag = 1;
							break;
						}
					}
					if(flag ==1)
					System.out.println("Yes");
					
					else {
						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