CREATE TABLE table_name_68 (transfer_fee VARCHAR, transfer_window VARCHAR, moving_to VARCHAR)

What transfer fee has both winter as the transfer window, and Madureira as the moving to?
SELECT transfer_fee FROM table_name_68 WHERE transfer_window = "winter" AND moving_to = "madureira"
SELECT "transfer_fee" FROM "table_name_68" WHERE "madureira" = "moving_to" AND "transfer_window" = "winter"