pick only one file matching pattern

hello gurus

I am working on a simple file pass through scenario. I have to pick 3 files.

ABCSG10<time_stamp>.txt,

ABCIN10<time_stamp>.txt and

ABCCN10<time_stamp>.txt

I have selected advanced selection for source file and used

ABCSG10*.txt

ABCIN10*.txt and
ABCCN10*.txt

respectively. Files will be archived once processed.

I want to add a condition under which if there are multiple files matching pattern, only one file from each will be picked.

How can I proceed? is this possible?

I am using FILE adapter with FTP protocol.

Regards,

Xineohpi