def longestCommonPrefix(self, strs: List[str]) -> str:
        result=""
        if len(strs)==0:
            return result
        elif len(strs) == 1:
          print("Longest common prefix:", strs[0])
        else:
          strs.sort()
          for i in range(len(strs[0])):
              if strs[0][i] == strs[-1][i]:
                  result += strs[0][i]
              else:
                  break
          return result
		  ```