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Source: \url{http://ctan.org/pkg/xii}  \begin{lstlisting}  \let~\catcode~`76~`A13~`F1~`j00~`P2jdefA71F~`7113jdefPALLF  PA''FwPA;;FPAZZFLaLPA//71F71iPAHHFLPAzzFenPASSFthP;A$$FevP