19. Different letters represent different numbers, for the five-digit number $\overline{A B C D E}$, the differences between adjacent digits are $F 、 G 、 H 、 I$, then the maximum value of $\overline{A B C D E}$ is $\qquad$.
\begin{tabular}{c}
19 \\
\hline 98274
\end{tabular}