好
ACDBACDBABCDBABCDABCDBACBDBABCBDACBDABCACDACBDACBADBCADBCADCBDACBDABCBDACBADBCDACBDACBDABCACBDABCDABCADCBDABCDABCACBDABCADCDACBADBCDACBDACBDABCDACBADCBDABCDABCADCBDACBCBADCBADBCADCBDACBDABCDABCDACBDABCADBCDACBADCBDACBDACBDABCAAACDDBACBABAACBDABCABCABCABCB