\documentclass[a4paper,11pt]{article}
\usepackage[polish]{babel}
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}
\usepackage{fourier}


\begin{document}

\begin{tabular}
{|c|@{\hspace{3pt}}c|@{\hspace{12pt}}c|@{}c|@{}c@{}|@{\dots}c@{abc}|}
X & X & X & X & X & X \\
X & X & X & X & X & X \\
X & X & X & X & X & X \\
X & X & X & X & X & X \\
\end{tabular}

\end{document}