A=lines, with words that starts with B, R or S and with a or n (like Serbia, Berlin)

B=lines that ends with 6 or 8, sort descending

C=ls

D=file result.txt

E=file error.txt

Familarize yourself with standart streams (stdin, stdout, stderr), pipelines, redirections, tee and xargs commands. Prepare text files: test.txt, pass.txt, city.txt (see practice task \#3) Use the command line to complete the tasks: - create newfile.txt, and write number of (A) in file city.txt to newfile.txt - append (B) from file city.txt to file newfile.txt - show newfile.txt - run command (C), redirect output to (D) and errors to (E) - complete task (F) (see next page)