The first line of the input contains a natural number `k`. The following lines contain a text made up of one or more lines. Determine and print how many words in the text have exactly `k` letters. A word is a maximal sequence of English letters (`a-z` or `A-Z`); digits, spaces, and punctuation marks are not part of a word. **The data are read from standard input** (in the format described), not from a file. After reading `k` with `cin >> k`, use `cin.ignore()` to skip the newline, then `cin.getline` for each line of text. Input: The first line contains the natural number `k`. The following lines contain the text, until end of input. - `1 <= k <= 30` - the number of text lines is between `0` and `100` - each line has at most `4000` characters Output: The program prints to standard output a single non-negative integer: how many words have exactly `k` letters. Example: Input: 3 un mar si o para sunt fructe Output: 1