Create Python script to compare two txt files with CIDR IPv4 IP addresses

Create Python script to compare two txt files with CIDR IPv4 IP subnets and output to another text file with the list of IP address missing or not present in a non-CIDR format.

File_A.txt will include a list of IP addresses (e.g. 10.0.0.1/24, 10.1.1.1/27, 10.2.2.2, 10.4.4.4, etc)
File_B.txt will also include a list of IP addresses (e.g. 10.0.0.1/27, 10.1.1.1/24, 10.3.3.3, 10.4.4.4, etc)

Output txt file(s) will include:
File_A:
10.1.1.31 - 10.1.1.254
10.3.3.3

File_B:
10.0.0.31 - 10.0.0.254
10.2.2.2