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'.

Input: Consider Input: 6963 aggiunta 6514 aggiunta 9567

Output: 23044


Input: Consider Input: 1081 aggiunta 3923 aggiunta 4772

Output: 9776


Input: Consider Input: 7927 aggiunta 879 aggiunta 8511 sottrazione 2893 aggiunta 7454


Output: 21878