A network administrator is setting up a network with $40$ hosts and a Class C address. If

they use a netmask of $255\mathrm{.}255\mathrm{.}255\mathrm{.}0,\_\_\_\_\_$ addresses will be unused and wasted.

Note, don$$t count the broadcast address or the network address. Enter your answer as a

single number. For example, if the answer is $99$ enter $99$ not ninety$-$nine.