CREATE TABLE table_21668 ("Season in Tamil" TEXT, "English Transliteration" TEXT, "English Translation" TEXT, "Season in Sanskrit" TEXT, "Season in English" TEXT, "Tamil Months" TEXT, "Gregorian Months" TEXT)

What are all Tamil months when the season in English is monsoon?
SELECT "Tamil Months" FROM table_21668 WHERE "Season in English" = 'Monsoon'
SELECT "Tamil Months" FROM "table_21668" WHERE "Season in English" = 'Monsoon'