157. Secret Code. Two conspirators had a secret code. Sometimes their correspondence contained simple arithmetic operations that looked completely innocent. However, in the code, each of the ten digits represented its own letter of the alphabet. Once, a sum was encountered which, after substituting the corresponding letters for the digits, took the form

$$
\begin{gathered}
F L Y \\
F O R \\
Y O U R \\
\hline L I F E^{* *}
\end{gathered}
$$

It would be interesting to restore this sum, knowing that $I$ and $O$ represent the digits 1 and 0, respectively.
157.

598

\[
+507
\]

\[
\begin{array}{r}
8047 \\
\hline 9152
\end{array}
\]