>set STRING=0123456789 >echo %STRING:~0% 0123456789 >echo %STRING:~1% 123456789 >echo %STRING:~-1% 9 >echo %STRING:~0,1% 0 >echo %STRING:~0,-3% 0123456 >echo %STRING:~1,1% 1 >echo %STRING:~-1,1% 9 >echo %STRING:~-2,2% 89 set OUTPUT_FILENAM…