documentclass[a4paper,12pt,twoside]{book}
usepackage[english]{babel}
usepackage[utf8]{inputenc}
usepackage{fancyhdr,lipsum}
pagestyle{fancy}
fancyhf{}
fancyhead[LE,RO]{Wynokane w LaTeX}
fancyhead[RE,LO]{Opisy i poradniki}
fancyfoot[CE,CO]{leftmark}
rhead{SZTYWNY}
begin{document}
test
newpage
test
newpage
rhead{leftmark}
chapter{Sample Chapter}
section{New section}
test
newpage
test
chapter{eldo}
section{na wolno}
test
newpage
test
end{document}
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}