#include <iostream>
#include <string>
using namespace std;

#define FOR(i, begin, end) for (int i = (begin), i##_end_ = (end); i < i##_end_; i++)
#define REP(i, n) FOR(i,0,n)

int main() {
    int T;
    cin >> T;
    while (T--) {
        int N;
        cin >> N;

        const int sum = (1 + N) * N / 2;

        auto solve = [&]() -> string {
            if (sum % 2) return "-1";
            if (N % 4 == 0) {
                string ret;
                REP(_, N / 4) ret += "1001";
                return ret;
            }

            if (N % 4 == 3) {
                string ret = "110";
                REP(_, N / 4) ret += "1001";
                return ret;
            }

            throw;
        };

        cout << solve() << '\n';
    }
}