Hashcat command

[congnv225]

I want to find the original string when I know its MD5 hash ( e0XX723aa2ca3XXXX44fde6fXXXXd7fb ).The original string has the format of 'X'-md:'Y', where X is an 8-character string consisting of uppercase letters and digits from 0 to 9, and Y is one of the three strings: 'Cung', 'Kiem', 'Gay'.
How do I use the command in Hashcat?