εκπαίδευση, γράφω άσκοπα, πρότυπο, αλφάβητο, πίσω στο σχολείο, σχεδιασμένο στο χέρι, ανάγλυφο, κυβερνήτης, υπολογιστή, οθόνη, σε απευθείας σύνδεση
Public Domain
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