from sys import exit

def i(): return input()
def ii(): return int(input())
def iis(): return map(int, input().split())
def liis():	return list(map(int, input().split()))
def print_array(a): print(" ".join(map(str, a)))

t = ii()
for _ in range(t):
	n = ii()
	if n == 1:
		print(-1)
	else:
		print('2'+'3'*(n-1))

