CREATE TABLE table_name_26 (stuffit VARCHAR(255), iso_cd_image VARCHAR(255), lha_lzh VARCHAR(255))
What is the StuffitX value that has a Stuffit of unknown, LHA/LZH of yes, and unknown ISO/CD image?
    
SQL: SELECT stuffit AS X FROM table_name_26 WHERE stuffit = "unknown" AND lha_lzh = "yes" AND iso_cd_image = "unknown"