for _ in range(int(input())):
    n = int(input())
    sm = n * (n + 1) // 2
    if sm % 2:
        print(-1)
        continue
    tgt = sm // 2
    ans = ['0'] * n
    for x in range(n, 0, -1):
        if x <= tgt:
            ans[x - 1] = '1'
            tgt -= x
    assert tgt == 0
    print(''.join(ans))