func isAllLetters(s string) bool {
	result := true

	for _, r := range s {
		if !unicode.IsLetter(r) && !unicode.IsSpace(r) {
			result = false
			break
		}
	}

	return result
}
// isAllLetters returns true if the given string is nothing but letters and spaces
isAllLetters returns true if the given string is nothing but letters and spaces
// isAllLetters returns true if the given string is nothing but letters and spaces
func isAllLetters(s string) bool {
	result := true
	for _, r := range s {
		if !unicode.IsLetter(r) && !unicode.IsSpace(r) {
			result = false
			break
		}
	}
	return result
}
func isAllLetters ( s string ) bool { result := true for _ , r := range s { if ! unicode . IsLetter ( r ) && ! unicode . IsSpace ( r ) { result = false break } } return result }
isAllLetters returns true if the given string is nothing but letters and spaces
isAllLetters returns true if the given string is nothing but letters and spaces