def decentNumber(n):
    fives3 = 0
    threes5 = 0

    for k in range(n//5+1):
        threes5 = k
        if (n - 5*k) % 3 == 0:
            fives3 = (n - 5*k)//3
            break
    
    if fives3*3 + threes5*5 != n:
        print(-1)
        return

    string = '5'*3*fives3 + '3'*5*threes5
    print(string)
    return