code: func UniqueStrings(ss []string) []string {
  	var m = make(map[string]bool, len(ss))
  	for _, s := range ss {
  		m[strings.Trim(s, " ")] = true
  	}
  
  	var us = make([]string, 0, len(m))
  	for k := range m {
  		us = append(us, k)
  	}
  
  	sort.Strings(us)
  
  	return us
  }
docs: // UniqueStrings returns a list on unique strings, trimming and sorting them
  // at the same time.