Stroke Count

The stroke count of the character j is 2, the character o has 1 stroke, and the character i has 2 strokes.

You are given a string $S$ of length $N$. Each character of $S$ is j, o, or i.

Find the total stroke count of the characters in $S$.

The input is given in the following format.

N
S

Print the total stroke count of the characters in $S$ without the unit (画).

Print only the answer. Do not print any other text, including prompts for input.

• $1 \le N \le 100$.
• $S$ is a string of length $N$.
• Each character of $S$ is j, o, or i.
• $N$ is an integer.