CREATE TABLE table_78850 ("Main contestant" TEXT, "Co-contestant  ( Yaar vs. Pyaar ) " TEXT, "Date performed" TEXT, "Scores by each individual judge" TEXT, "Total score/week" TEXT, "Position" TEXT, "Status" TEXT)

Who is the main contestant with scores by each individual judge of 8 + 7 + 7 = 21?
SELECT "Main contestant" FROM table_78850 WHERE "Scores by each individual judge" = '8 + 7 + 7 = 21'
SELECT "Main contestant" FROM "table_78850" WHERE "Scores by each individual judge" = '8 + 7 + 7 = 21'