int ladderLength(std::string beginWord, std::string endWord, std::vector<std::string>& wordList);

static void test()

{

std::string beginWord{"hit"};

std::string endWord{"cog"};

std::vector<std::string> wordList{"hot","dot","dog","lot","log"};

Solution127 s;

printf("%d\n", s.ladderLength(beginWord, endWord, wordList));

}