generateList

def generateList(isOk, start, end):
    if start > end:
        return []

    if isOk(start):
        return [start] + generateList(isOk, start + 1, end)

    return generateList(isOk, start + 1, end)


a = int(input("a="))
b = int(input("b="))
print(generateList(lambda x: x % 7 == 0, a, b))