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    28 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%  | 
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    29 \begin{frame}[t] | 
    30 \frametitle{% | 
    30 \frametitle{% | 
    31   \begin{tabular}{@ {}c@ {}} | 
    31   \begin{tabular}{@ {}c@ {}} | 
    32   \\[-3mm]  | 
    32   \\[-3mm]  | 
    33   \LARGE Compilers and \\[-2mm]   | 
    33   \LARGE Compilers and \\[-1mm]   | 
    34   \LARGE Formal Languages\\[3mm]   | 
    34   \LARGE Formal Languages\\[-5mm]   | 
    35   \end{tabular}} | 
    35   \end{tabular}} | 
    36   | 
    36   | 
    37   \normalsize  | 
    37   \normalsize  | 
    38   \begin{center} | 
    38   \begin{center} | 
    39   \begin{tabular}{ll} | 
    39   \begin{tabular}{ll} | 
    40     Email:  & christian.urban at kcl.ac.uk\\  | 
    40   Email:  & christian.urban at kcl.ac.uk\\  | 
    41     %Office Hours: & Thursdays 12 -- 14\\  | 
    41   Office Hour: & Fridays 11 -- 12\\  | 
    42     %Location: & N7.07 (North Wing, Bush House)\\  | 
    42   Location: & N7.07 (North Wing, Bush House)\\  | 
    43     Slides \& Progs: & KEATS (also homework is there)\\    | 
    43   Slides \& Progs: & KEATS\\  | 
         | 
    44   Pollev: & \texttt{\alert{https://pollev.com/cfltutoratki576}}\\   | 
    44   \end{tabular} | 
    45   \end{tabular} | 
    45 \end{center} | 
    46   \end{center} | 
    46   | 
    47   | 
    47   \begin{center} | 
    48   \begin{center} | 
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