[luatex] (no subject)

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Hello,

please tell me waht i can add polish letter to document i lualatex ?
in latex test.tex all working in lualatex i get
 Package inputenc Error: Unicode char \u8:ółty not set up for use with
LaTeX

====
\documentclass[12pt,openany]{mwbk}
\usepackage{polski}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lipsum}

\begin{document}
\lipsum [1]
żółty

\end{document}

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