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Score : $100$ points

### Problem Statement

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 1

+-++


### Sample Output 1

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 $2$.

### Sample Input 2

-+--


### Sample Output 2

-2


### Sample Input 3

----


### Sample Output 3

-4