text: #include <stdio.h>
  #include <stdlib.h>
  
  #define True 1
  #define False 0
  
  int isLetter(char character);
  
  int main(void)
  {
    char character;
    int qtdLetters = 0;
  
    while(True)
    {
      scanf("%c", &character);
      if(character == '.')
        break;
      if(isLetter(character))
        qtdLetters++;
    }
      
    printf("RESP: %d", qtdLetters);
  
    return 0;
  }
  
  int isLetter(char character)
  {
    return ((character >= 'a' && character <= 'z') || (character >= 'A' && character <= 'Z')) ? True : False;
  }