\begin{table}
\centering
\begin{tabular}{c c c}
\hline
\textbf{ID} & \textbf{None Standard} & \textbf{Standard} \\
\hline
1 & 
\begin{tabular}{@{}c@{}}ð\\ \small\verb|00F0|\end{tabular} & 
\begin{tabular}{@{}c@{}}đ\\ \small\verb|0111|\end{tabular} \\
\hline
2 & 
\begin{tabular}{@{}c@{}}Ð\\ \small\verb|00D0|\end{tabular} & 
\begin{tabular}{@{}c@{}}Đ\\ \small\verb|0110|\end{tabular} \\
\hline
\end{tabular}
\caption{Character standardization rules}
\label{table:character_rules}
\end{table}