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 -.

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