Underlying principles and recurring ideas of formal grammars -- Sliding Window Algorithms for Regular Languages -- Reshaping the context-free model: linguistic and algorithmic aspects -- Disturbance Decoupling in Finite Automata -- On the synchronization of planar automata -- Event-Clock Nested Automata -- On Periodicity Lemma for Partial Words -- Bubble-Flip - A New Generation Algorithm for Prefix Normal Words -- Pomsets and Unfolding of Reset Petri Nets -- Over-Approximative Petri Net Synthesis for Restricted Subclasses of Nets -- Measuring Closeness between Cayley Automatic Groups and Automatic Groups -- Permutations sorted by a finite and an infinite stack in series -- Analytic combinatorics of lattice paths with forbidden patterns: enumerative aspects -- Deciding regular intersection emptiness of complete problems for PSPACE and the polynomial hierarchy -- Descriptional and computational complexity of the circuit representation of finite automata -- Model Learning as a Satisfiability Modulo Theories Problem -- Default Logic and Bounded Treewidth -- General Class of Monoids Supporting Canonisation and Minimisation of (Sub)sequential Transducers -- Learners Based on Transducers -- Handling ties correctly and efficiently in Viterbi training using the Viterbi semiring -- Formal languages over GF(2) -- Timed Comparisons of Semi-Markov Processes -- Efficient Translation with Linear Bimorphisms.