\documentclass[compress, german, t]{beamer}

\usepackage[ngerman,english]{babel}
\uselanguage{German}
\languagepath{German}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}

\usepackage{helvet}
\usepackage{url}
\usepackage{listings}
\usepackage{xcolor}
\usepackage{tikz}
\usepackage{pgfplots}
\usepackage{mathdots}
\usetikzlibrary{automata}
\usetikzlibrary{calc}
\usetikzlibrary{shapes}
\usetikzlibrary{positioning}
\usetikzlibrary{chains}
\usepackage{tabu}

\usepackage{beamerthemeLEA2}

\newcommand{\N}       {\mathbb{N}}          % natürliche Zahlen
\newcommand{\Z}       {\mathbb{Z}}          % ganze Zahlen
\newcommand{\R}       {\mathbb{R}}          % reelle Zahlen
\newcommand{\Prob}    {\mathrm{P}}          % Wahrscheinlichkeit
\newcommand{\Oh}      {\mathcal{O}}         % O-Notation (Landau-Symbole)
\newcommand{\mycite}[1]{\textcolor{tumgreen}{[#1]}}

\tikzstyle{every edge} = [draw,very thick,->,>=latex]
\tikzstyle{every state} = [circle,thick,draw,fill=tumblue!10]
\tikzstyle{automaton} = [shorten >=1pt, node distance = 3cm, auto, bend angle=20, initial text=]
\tikzstyle{small} = [every node/.style={scale=0.5}, baseline=(current bounding box.north), font=\LARGE]

\tikzstyle{rectangular} = [draw, rectangle, minimum size = 6mm, fill=tumblue!10]
\tikzstyle{tape} = [on chain, rectangular]
\tikzstyle{active} = [fill=tumred!10]
\tikzstyle{head} = [arrow box, draw, minimum size=5mm, arrow box arrows={east:.25cm, west:0.25cm, north:0.2cm}, fill=tumred!10]
\tikzstyle{machine} = [rectangle, draw, minimum width=2cm, minimum height=1cm, inner sep=3mm, fill=tumgreen!10]

\newcommand{\pcp}[2]{ \begin{tabu}{c} #1 \\ \tabucline{-} #2 \\ \end{tabu} }
\newcommand{\chomsky}[4]{\draw[rect, #1, fill=#1!10, #2] ({5.5 - #3 * 1}, {0 + #3 * 0.3}) rectangle ({-5.5 + #3 * 1}, {7 - #3 * 1.2}) node[caption] {#4};}
\newcommand{\langclass}[4]{\draw[rect, #1, fill=#1!20, #2] ({5.2 - #3 * 0.5}, {0 + #3 * 0.12}) rectangle ({-5.2 + #3 * 0.5}, {7.5 - #3 * 0.75}) node[caption] {#4};}