CREATE TABLE table_51005 ("Year" FLOAT, "Nord" TEXT, "West" TEXT, "S\\u00fcdwest" TEXT, "Berlin" TEXT)

What is the earliest year borussia dortmund was west and bfc viktoria 1889 was Berlin?
SELECT MIN("Year") FROM table_51005 WHERE "West" = 'borussia dortmund' AND "Berlin" = 'bfc viktoria 1889'
SELECT MIN("Year") FROM "table_51005" WHERE "Berlin" = 'bfc viktoria 1889' AND "West" = 'borussia dortmund'