Name of output files

What i can do in order to the name of output files is the same as input files? I tried more time

First time:
i added some files in product explorer.
Design the graph and save the graph with remove additional symbols from write window.
open batch processing
Uncheck keep source product name.
add files
load Graph

The output:
first file without additional symbols but the other files with additional symbols.

Second time:
Design the graph and save the graph with remove additional symbols from write window, but without add files in product explorer.
open batch processing
Uncheck keep source product name.
add files
load Graph

The output:
The all files with additional symbols.

After that, I repeated all previous steps with check keep source product name, but the name of output file isn’t the same as input files.