In this task you will be given an arithmetic operation in Italian and you have to find its answer. The operations 'addition' and 'subtraction' have been replaced with their italian translations i.e you need to perform addition when you see 'aggiunta' and subtraction in case of 'sottrazione'.
--------
Question: 6639 sottrazione 5121 aggiunta 205 aggiunta 2175 aggiunta 4534 sottrazione 1535

Answer: 6897


Question: 7401 aggiunta 1797 sottrazione 1774

Answer: 7424


Question: 6507 sottrazione 8839 aggiunta 1693 aggiunta 9053

Answer:
8414