I really need help over this question.?

In networking, a class B address is a bit string of length 32. The first two bits from the left are 10xx xxxx (to identify it as a Class B address). The next 14 bits, called the netid, identify the network. The remaining 16 bits, called the hostid, identify the computer interface (the hosts). The netid must not consist of all 1’s. The hostid must not consist of all 0’s or all 1’s. How many class B Internet addresses are there.