\documentclass[a4paper]{article}

\usepackage{verbatim,acmp}


\begin{document}
\titel{B}{Y2K}{y2k}

A big software company (which does not want to be mentioned here by
name) has not yet made its software Year-2000 compliant. Now, there is
not much time left, so they want you to write a program that
automatically removes all year-2000-bugs (Y2K-bugs).


\section*{Input}

The input file contains a program written in Obfuscal. This language
uses a very modern method to avoid compile-time errors: \emph{Any}
sequence of ASCII characters ending with ``\texttt{END}'' (and not
containing ``\texttt{END}'' anywhere else) can be compiled.

Due to the width of the screens used by the software company, no line
of the program will contain more than 131 characters.

\section*{Output}

Output the same program without any Y2K-bug. A Y2K-bug in Obfuscal is
simply a substring ``\texttt{Y2K}'' (capital {\tt Y} and {\tt K}).

\section*{Sample Input}

\verbatiminput{y2k.in}

\section*{Sample Output}

\verbatiminput{y2k.out}



\end{document}

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