Don't read this clause:"Input contains a text that consists of capital and small letters of the Latin alphabet (A–Z, a–z), punctuation marks (.,;:-!?) and spaces.".

Because, when I read data by this clause, I got WA#1. When I read data by this clause with enter, I got WA#3. When I read data by end of file, I got AC.

You are right. There was a mistake in the problem statement. Statement is fixed now.

The sentence mustn't terminated by dot.