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.

+-++

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 $2$.

-+--

-2

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-4