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

void solve() {
    int N;
    cin >> N;
    if( N%4 == 0 ) {
        for( int i = 0; i < N/4; i++ ) cout << "0110";
        cout << "\n";
    }else if( N%4 == 3 ) {
        cout << "110";
        for( int i = 0; i < (N-3)/4; i++ ) cout << "0110";
        cout << "\n";
    }else {
        cout << "-1\n";
    }
}

int main() {
    int T;
    cin >> T;
    while(T--) { solve(); }
}

/*

N * (N + 1) / 2

N mod 4 が 0, 3

1 2 3 4 5 6 7

0 は簡単 (0110 を繰り返す)
3 は 1 2 3 で調整

*/