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import java.util.Scanner;

public class Act {
 
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in); 

    System.out.print("Enter Paragraph :  ");
    String string = input.nextLine();


    System.out.println(
      "Number of letters: "  
       + countLetters(string));        
  }

  public static int countLetters(String s) {
    int numberOfLetters = 0; 
    for (int i = 0; i < s.length(); i++) {
   
      if (Character.isLetter(s.charAt(i)))
        numberOfLetters++;
    }
    return numberOfLetters;
  }
}