#include <bits/stdc++.h>
using namespace std;
void solve() {
  int n;
  cin >> n;
  if (n % 2 == 0) {
    for (int i = 0; i < n / 2; i++) {
      cout << 1;
    }
    cout << endl;
  } else {
    cout << 7;
    int k = n / 2 - 1;
    for (int i = 0; i < k; i++) {
      cout << 1;
    }
    cout << endl;
  }
}
int main() {
  int T;
  cin >> T;
  while (T--) {
    solve();
  }
  return 0;
}
