import java.util.*;

public class Main{
    public static void main(String args[]){
        Scanner sn = new Scanner(System.in);
        int N = sn.nextInt();
        if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        }

    }
} import java.util.*; util.* java public class Main{
    public static void main(String args[]){
        Scanner sn = new Scanner(System.in);
        int N = sn.nextInt();
        if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        }

    }
} Main public static void main(String args[]){
        Scanner sn = new Scanner(System.in);
        int N = sn.nextInt();
        if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        }

    } main {
        Scanner sn = new Scanner(System.in);
        int N = sn.nextInt();
        if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        }

    } Scanner sn = new Scanner(System.in); sn new Scanner(System.in) int N = sn.nextInt(); N sn.nextInt() sn.nextInt sn if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        } N % 10 == 7 N % 10 N 10 7 {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        } N = N/10 N N/10 N 10 if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            } N % 10 == 7 N % 10 N 10 7 {
                System.out.println("Yes");
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            } N = N/10 N N/10 N 10 if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                } N % 10 == 7 N % 10 N 10 7 {
                    System.out.println("Yes");
                } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
                    System.out.println("No");
                } 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[]){
        Scanner sn = new Scanner(System.in);
        int N = sn.nextInt();
        if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        }

    }
} public class Main{
    public static void main(String args[]){
        Scanner sn = new Scanner(System.in);
        int N = sn.nextInt();
        if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        }

    }
} Main
import java.util.*;

public class Main{
    public static void main(String args[]){
        Scanner sn = new Scanner(System.in);
        int N = sn.nextInt();
        if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    System.out.println("No");
                }
            }
        }

    }
}