CREATE TABLE table_5599 ("Season" CLOB, "Regionalliga S\\u00fcd" CLOB, "Regionalliga West/S\\u00fcdwest" CLOB, "Regionalliga Nord" CLOB, "Regionalliga Nord-Ost" CLOB)

What was the Regionalliga Nord-Ost for the team that had a Regionalliga Sud of SpVgg Unterhaching?
SELECT "Regionalliga Nord-Ost" FROM table_5599 WHERE "Regionalliga S\u00fcd" = 'spvgg unterhaching'
SELECT "Regionalliga Nord-Ost" FROM "table_5599" WHERE "Regionalliga S\u00fcd" = 'spvgg unterhaching'