CREATE TABLE table_35051 ("gzip" TEXT, "bzip2" TEXT, "LHA/LZH" TEXT, "StuffIt" TEXT, "StuffIt X" TEXT, "ISO/CD Image" TEXT)

What is the StuffitX value that has a Stuffit of unknown, LHA/LZH of yes, and unknown ISO/CD image?
SELECT "StuffIt X" FROM table_35051 WHERE "StuffIt" = 'unknown' AND "LHA/LZH" = 'yes' AND "ISO/CD Image" = 'unknown'
SELECT "StuffIt X" FROM "table_35051" WHERE "ISO/CD Image" = 'unknown' AND "LHA/LZH" = 'yes' AND "StuffIt" = 'unknown'