Specific DHCP config

Hi all,
Im using Ubuntu and due to the nature of my application, I have to configure a DHCP server that assigns addresses that end with bits '10'. The IP addresses must be of the type 10.x.y.z/22

So some examples of IP addr to be assigned:

As you see all the IP addr end with '10' binary bits.

How do I write the dhcpd.conf file?

Thanks a lot in advance