This config file contains at least three lines (verbose mode, number of files and directory name) and the list of tree files to be analysed.

0                  verbose_mode_(0=low,1=high,2=graphics)
1                  number_of_files_to_read
data               directory_from_where_to_read
dd_1M1.root
dd_1M2.root
dd_1M3.root
dd_1M4.root
dd_1M5.root