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   "output": "F.FFF                                                                    [100%]\n=================================== FAILURES ===================================\n_____________________________ test_classic_example _____________________________\ntest_ladder.py:7: in test_classic_example\n    assert ladder_length(\"hit\", \"cog\", [\"hot\", \"dot\", \"dog\", \"lot\", \"log\", \"cog\"]) == 5\nE   AssertionError: assert 0 == 5\nE    +  where 0 = ladder_length('hit', 'cog', ['hot', 'dot', 'dog', 'lot', 'log', 'cog'])\n_______________________________ test_single_step _______________________________\ntest_ladder.py:15: in test_single_step\n    assert ladder_length(\"a\", \"c\", [\"a\", \"b\", \"c\"]) == 2\nE   AssertionError: assert 1 == 2\nE    +  where 1 = ladder_length('a', 'c', ['a', 'b', 'c'])\n____________________________ test_shortest_is_found ____________________________\ntest_ladder.py:20: in test_shortest_is_found\n    assert ladder_length(\"hit\", \"cot\", words) == 3\nE   AssertionError: assert 2 == 3\nE    +  where 2 = ladder_length('hit', 'cot', ['hot', 'hit', 'hat', 'cat', 'cot', 'cog', ...])\n__________________________ test_larger_input_is_fast ___________________________\ntest_ladder.py:26: in test_larger_input_is_fast\n    assert ladder_length(\"aaa\", \"hhh\", words) == 4\nE   AssertionError: assert 3 == 4\nE    +  where 3 = ladder_length('aaa', 'hhh', ['aaa', 'aab', 'aac', 'aad', 'aae', 'aaf', ...])\n=========================== short test summary info ============================\nFAILED test_ladder.py::test_classic_example - AssertionError: assert 0 == 5\nFAILED test_ladder.py::test_single_step - AssertionError: assert 1 == 2\nFAILED test_ladder.py::test_shortest_is_found - AssertionError: assert 2 == 3\nFAILED test_ladder.py::test_larger_input_is_fast - AssertionError: assert 3 == 4\n4 failed, 1 passed in 0.09s\n"
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  "ladder.py": "from collections import deque\n\ndef ladder_length(begin: str, end: str, word_list: list[str]) -> int:\n    if begin not in word_list or end not in word_list:\n        return 0\n    \n    queue = deque([(begin, 1)])\n    visited = set([begin])\n    while queue:\n        word, step = queue.popleft()\n        for i in range(len(word)):\n            for char in \"abcdefghijklmnopqrstuvwxyz\":\n                new_word = word[:i] + char + word[i+1:] \n                if new_word not in visited and new_word in word_list:\n                    if new_word == end:\n                        return step\n                    queue.append((new_word, step + 1))\n                    visited.add(new_word)\n    return 0"
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 "test_output": "F.FFF                                                                    [100%]\n=================================== FAILURES ===================================\n_____________________________ test_classic_example _____________________________\ntest_ladder.py:7: in test_classic_example\n    assert ladder_length(\"hit\", \"cog\", [\"hot\", \"dot\", \"dog\", \"lot\", \"log\", \"cog\"]) == 5\nE   AssertionError: assert 0 == 5\nE    +  where 0 = ladder_length('hit', 'cog', ['hot', 'dot', 'dog', 'lot', 'log', 'cog'])\n_______________________________ test_single_step _______________________________\ntest_ladder.py:15: in test_single_step\n    assert ladder_length(\"a\", \"c\", [\"a\", \"b\", \"c\"]) == 2\nE   AssertionError: assert 1 == 2\nE    +  where 1 = ladder_length('a', 'c', ['a', 'b', 'c'])\n____________________________ test_shortest_is_found ____________________________\ntest_ladder.py:20: in test_shortest_is_found\n    assert ladder_length(\"hit\", \"cot\", words) == 3\nE   AssertionError: assert 2 == 3\nE    +  where 2 = ladder_length('hit', 'cot', ['hot', 'hit', 'hat', 'cat', 'cot', 'cog', ...])\n__________________________ test_larger_input_is_fast ___________________________\ntest_ladder.py:26: in test_larger_input_is_fast\n    assert ladder_length(\"aaa\", \"hhh\", words) == 4\nE   AssertionError: assert 3 == 4\nE    +  where 3 = ladder_length('aaa', 'hhh', ['aaa', 'aab', 'aac', 'aad', 'aae', 'aaf', ...])\n=========================== short test summary info ============================\nFAILED test_ladder.py::test_classic_example - AssertionError: assert 0 == 5\nFAILED test_ladder.py::test_single_step - AssertionError: assert 1 == 2\nFAILED test_ladder.py::test_shortest_is_found - AssertionError: assert 2 == 3\nFAILED test_ladder.py::test_larger_input_is_fast - AssertionError: assert 3 == 4\n4 failed, 1 passed in 0.09s\n"
}