def isKaprekar(number):
    s = str(number ** 2)
    if len(s) == 1:
        s = "0" + s
    if int(s[:len(s) // 2]) + int(s[len(s) // 2:]) == number:
        return True
    return False

p = int(input())
q = int(input())
l = []
for i in range(p, q):
    if isKaprekar(i):
        l.append(i)
if len(l) == 0:
    print("INVALID RANGE")
else:
    print(*l)