C:\Perl>perl onfour.pl
FILE: output_1.txt
15525 18026 - S00001GM001 sml_032 sp|V023334 desc
FILE: output_2.txt
32763 34239 + S00002GM001 sml_028 sp|YV02376 desc
FILE: output_3.txt
67929 68933 - S00003GM001 sml_025 sp|YV02346 desc
FILE: output_10.txt
11880 13417 - S00010GM001 sml_056 sp|YV02233 desc
13804 14685 - S00010GM002 sml_045 sp|YV02643 desc
FILE: output_12.txt
90562 91368 + S00012GM001 sml_025 sp|YV02376 desc
10209 10433 - S00012GM002 sml_046 sp|YV02355 desc
FILE: output_13.txt
12522 12576 + S00013GM001 sml_027 sp|0235777 desc
13247 13349 - S00013GM002 sml_088 sp|YV02375 desc