def decentNumber(n):
    fives = n
    threes = 0
    
    while fives >= 0:
        if fives % 3 == 0 and threes % 5 == 0:
            break
        else:
            fives -= 1
            threes += 1
    print(-1 if fives < 0 else ('5' * fives) + ('3' * threes))