Solve the programming task below in a Python markdown code block.
There is always an integer in Takahashi's mind.
Initially, the integer in Takahashi's mind is 0. Takahashi is now going to eat four symbols, each of which is + or -. When he eats +, the integer in his mind increases by 1; when he eats -, the integer in his mind decreases by 1.
The symbols Takahashi is going to eat are given to you as a string S. The i-th character in S is the i-th symbol for him to eat.
Find the integer in Takahashi's mind after he eats all the symbols.

-----Constraints-----
 - The length of S is 4.
 - Each character in S is + or -.

-----Input-----
Input is given from Standard Input in the following format:
S

-----Output-----
Print the integer in Takahashi's mind after he eats all the symbols.

-----Sample Input-----
+-++

-----Sample Output-----
2

 - Initially, the integer in Takahashi's mind is 0.
 - The first integer for him to eat is +. After eating it, the integer in his mind becomes 1.
 - The second integer to eat is -. After eating it, the integer in his mind becomes 0.
 - The third integer to eat is +. After eating it, the integer in his mind becomes 1.
 - The fourth integer to eat is +. After eating it, the integer in his mind becomes 2.
Thus, the integer in Takahashi's mind after he eats all the symbols is 2.