funcsAO.go
func ChompLeft(s, prefix string) string {
	if strings.HasPrefix(s, prefix) {
		return s[len(prefix):]
	}
	return s
}
func ChompLeft(s, prefix string) string {
	if strings.HasPrefix(s, prefix) {
		return s[len(prefix):]
	}
	return s
}
// ChompLeft removes prefix at the start of a string.