12.4.29 Various Olympiad Problems

Condition: In the ABC Morse, each letter is encrypted with a sequence of points and dash. For example, the letter A responds to the sequence (.-), the letter of the: (--.-), and the letter T: (-). Prove that the Latin alphabet (26 letters) can be encrypted with the help of sequences that are no more than 4 points and dash, and for the Russian alphabet you will have to use five -membered sequences of points and dash.