T = int(input())
for _ in range(T):
    N = int(input())
    v = N * (N + 1) // 2
    if v % 2:
        print(-1)
        continue
    v //= 2
    ans = [0] * N
    for i in range(N, 0, -1):
        if v >= i:
            v -= i
            ans[i - 1] = 1
    print(*ans, sep="")