CREATE TABLE table_25277 ("Constituency" TEXT, "Winner" TEXT, "Party" TEXT, "Margin" FLOAT, "Runner-up a" TEXT, "Party a" TEXT)

Name the party a for sriperumbudur
SELECT "Party a" FROM table_25277 WHERE "Constituency" = 'Sriperumbudur'
SELECT "Party a" FROM "table_25277" WHERE "Constituency" = 'Sriperumbudur'