
\begin{center}
\begin{tabular}{|l|c|c|c|c|c|c|}
\hline
& level 1 & level 2 & level 3 & level 4 & level 5 & level 6 \\
\hline
4-4-x-x & 4-4-2-2 & 5-5-3-1 & 5-5-1-3 & & & \\
6-4-x-x & 6-4-2-0 & 6-4-0-2 & 7-5-1-1 & 8-4-0-0 & & \\
6-x-x-x & 6-2-2-2 & 7-3-3-1 & 7-3-1-3 & 7-1-3-3 & & \\
8-x-x-x & 8-2-2-0 & 8-2-0-2 & 8-0-2-2 & 9-3-1-1 & 9-1-3-1 & 9-1-1-3 \\
10-x-x-x & 10-2-0-0 & 10-0-2-0 & 10-0-0-2 & 11-1-1-1 & 12-0-0-0 & \\
\hline
%4-3-x-x & 5$^=$-3-3-3 & 4-4-2-2 & 5-5-3-1 & 5-5-1-3 & & \\
5-4-x-x & 4-4-x-x & 6-4-x-x & 6-6-0-0 &         &         & \\
%5-5-x-x & 4-4-x-x & 6-4-x-x & 4-6-x-x & 6-6-0-0 &         & \\
5-x-x-x & 5-3-3-3 & 6-2-2-2 & 7-3-3-1 & 7-3-1-3 & 7-1-3-3 & \\
%\hline
%5-4-4-x$^+$ & 5-x-x-x & 5-5-x-x & 5-x-5-x & 4-4-4-0 & 8-x-x-x & \\
%5-4-4-x$^-$ & 5-3-3-3 & 4-4-x-x & 4-x-4-x & 4-4-4-0 &         & \\
%5-4-x-y$^+$ & 5-x-x-x & 5-5-x-x & 4-4-4-0 & 8-x-x-x &         &\\
%5-4-x-y$^-$ & 5-3-3-3 & 4-4-x-x & 4-4-4-0 & 4-6-x-x &         &\\
\hline
\end{tabular}
%\label{tab1}
\vspace{5pt}

\emph{Table 3} Decoding (and encoding) distribution groups.\\
Last two meta-groups are specific to the system.
\end{center}


