def solve(n):
    m = n * (n + 1) // 2
    if m % 2 == 1:
        print(-1)
        return

    tf = [0] * n
    x = m // 2
    for i in range(n, 0, -1):
        if x >= i:
            tf[i - 1] = 1
            x -= i
    print(*tf, sep="")


for _ in range(int(input())):
    n = int(input())
    solve(n)