import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{
  public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    char[] n = reader.readLine().toCharArray();
    if(n[0]=='7'|| n[1]=='7'|| n[2]=='7')
      System.out.println("Yes");
    else
      System.out.println("No");
  }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main{
  public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    char[] n = reader.readLine().toCharArray();
    if(n[0]=='7'|| n[1]=='7'|| n[2]=='7')
      System.out.println("Yes");
    else
      System.out.println("No");
  }
} Main public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    char[] n = reader.readLine().toCharArray();
    if(n[0]=='7'|| n[1]=='7'|| n[2]=='7')
      System.out.println("Yes");
    else
      System.out.println("No");
  } main {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    char[] n = reader.readLine().toCharArray();
    if(n[0]=='7'|| n[1]=='7'|| n[2]=='7')
      System.out.println("Yes");
    else
      System.out.println("No");
  } BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); reader new BufferedReader(new InputStreamReader(System.in)) char[] n = reader.readLine().toCharArray(); n reader.readLine().toCharArray() reader.readLine().toCharArray reader.readLine() reader.readLine reader if(n[0]=='7'|| n[1]=='7'|| n[2]=='7')
      System.out.println("Yes");
    else
      System.out.println("No"); n[0]=='7'|| n[1]=='7'|| n[2]=='7' n[0]=='7'|| n[1]=='7'|| n[2]=='7' n[0]=='7' n[0] n 0 '7' n[1]=='7' n[1] n 1 '7' n[2]=='7' n[2] n 2 '7' System.out.println("Yes") System.out.println System.out System System.out "Yes" 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) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    char[] n = reader.readLine().toCharArray();
    if(n[0]=='7'|| n[1]=='7'|| n[2]=='7')
      System.out.println("Yes");
    else
      System.out.println("No");
  }
} public class Main{
  public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    char[] n = reader.readLine().toCharArray();
    if(n[0]=='7'|| n[1]=='7'|| n[2]=='7')
      System.out.println("Yes");
    else
      System.out.println("No");
  }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{
  public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    char[] n = reader.readLine().toCharArray();
    if(n[0]=='7'|| n[1]=='7'|| n[2]=='7')
      System.out.println("Yes");
    else
      System.out.println("No");
  }
}