FreeCommander Forum

Hello.
I have such problem: folder contains several files with names like below, sorted by extension:
aaa.xxx.1
aaa.yyy.1
ddddd.xxx.1
aaa.xxx.2
aaa.yyy.2
aaa.xxx.3
cc.xxx.6
cc.yyy.6
ddddd.zzz.6
ddddd.zzz.7
cc.yyy.7
cc.yyy.8
bbbb.xxx.12
bbbb.xxx.13

It means that every file has 2 extensions: 1st - filetype, 2nd - version. How can i sort these files by 1st ext. with additional sort by 2nd ext.? (like in example below)
aaa.xxx.1
aaa.xxx.2
aaa.xxx.3
bbbb.xxx.12
bbbb.xxx.13
cc.xxx.6
ddddd.xxx.1
aaa.yyy.1
aaa.yyy.2
cc.yyy.6
cc.yyy.7
cc.yyy.8
ddddd.zzz.6
ddddd.zzz.7