CREATE TABLE table_44675 ("Nat." TEXT, "Name" TEXT, "Moving to" TEXT, "Type" TEXT, "Transfer window" TEXT, "Transfer fee" TEXT, "Source" TEXT)

What transfer fee has both winter as the transfer window, and Madureira as the moving to?
SELECT "Transfer fee" FROM table_44675 WHERE "Transfer window" = 'winter' AND "Moving to" = 'madureira'
SELECT "Transfer fee" FROM "table_44675" WHERE "Moving to" = 'madureira' AND "Transfer window" = 'winter'