//
//  main.cpp
//  CoderProj
//
//  Created by Minoru Hayashi on 2020/04/04.
//  Copyright © 2020 Minoru Hayashi. All rights reserved.
//
//  ABC162
//
//

#include <bits/stdc++.h>
using namespace std;

#define REP(i,n) for (int i=0; i<(n); i++)
#define REP2(i,x,n) for (int i=x; i<(n); i++)
#define ALL(n) begin(n), end(n)

using ll = long long;

template<class T> inline bool chmin(T& a, T b){ if(a>b){a=b; return 1;} return 0;}
template<class T> inline bool chmax(T& a, T b){ if(a<b){a=b; return 1;} return 0;}

// const ll INF = 1LL<<60;
// const int INF = 1<<29;
// const ll MOD = 1000000007;
//#define __DBG__

void solve(void){
  
  string S;
  
  cin >> S;
  
  bool flag=false;
  REP(i, S.size()){
    if(S[i]=='7'){flag=true; break;}
  }
  if(flag){
    cout << "Yes" <<endl;
    
  }
  else{
    cout << "No" << endl;
  }
  
  return;
   
}



#define TESTCASES 1

int main(int argc, const char * argv[]) {


    cin.tie(0);
    ios::sync_with_stdio(false);

    REP(i,TESTCASES){
      solve();
    }
 
    return 0;
}

