#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    if (n % 2 == 0) {
      for (int i = 0; i < (n / 2); i++) {
        cout << "1";
      }
      cout << "\n";
      continue;
    }
    if (n % 2 == 1) {
      cout << "7";
      for (int i = 0; i < ((n - 3) / 2); i++) cout << "1";
      cout << "\n";
    }
  }
}
