import sys can u telll me what is error in my code

t = int(raw_input())

test = 0

for a0 in xrange(t):

n = int(raw_input().strip())
for i in range(0,n):
    if (n-5*i)>=0 and (n-5*i)%3==0:
        print("5"*(n-5*i)+"3"*(i*5))
        test = test + 1
    if test==0:
        print("-1")