assert('md2 1', '8350e5a3e24c153df2275c9f80692773', md2(''));
assert('md2 2', '03d85a0d629d2c442e987525319fc471', md2('The quick brown fox jumps over the lazy dog'));
assert('md2 3', '71eaa7e440b611e41a6f0d97384b342a', md2('The quick brown fox jumps over the lazy dog.'));
assert('md2 4', '7af93c270b0ec392ca2f0d90a927cf8a', md2('中文'));