An IPv4 address is a 32-bit address of the form aaa.bbb.ccc.ddd where aaa, bbb, ccc, and ddd are all in the range 0 to 255. Given an integer that stores an IPv4 address with the most-significant bits representing aaa, second most-significant bits representing bbb, and so on, returns the IPv4 address in the canonical form of "aaa.bbb.ccc.ddd"