CREATE TABLE table_1277350_5 (thursday_fourth_day VARCHAR, day__see_irregularities__ VARCHAR)

What's the Slovene word for Thursday?
SELECT thursday_fourth_day FROM table_1277350_5 WHERE day__see_irregularities__ = "Slovene"
SELECT "thursday_fourth_day" FROM "table_1277350_5" WHERE "Slovene" = "day__see_irregularities__"