CREATE TABLE table_23835213_2 (undisclosed VARCHAR2, wycombe_wanderers VARCHAR2)

What is the undisclosed when Wycombe Wanderers is unattached?
SELECT undisclosed FROM table_23835213_2 WHERE wycombe_wanderers = "Unattached"
SELECT "undisclosed" FROM "table_23835213_2" WHERE "Unattached" = "wycombe_wanderers"