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C - String Delimiter

Score : $300$ points

Problem Statement

You are given a string $S$ of length $N$ consisting of lowercase English letters, ,, and ". It is guaranteed that $S$ contains an even number of ".

Let $2K$ be the number of " in $S$. For each $i=1,2,\ldots,K$, the characters from the $(2i-1)$-th " through the $(2i)$-th " are said to be enclosed.

Your task is to replace each , in $S$ that is not an enclosed character with . and print the resulting string.

Constraints

• $N$ is an integer between $1$ and $2\times 10^5$, inclusive.
• $S$ is a string of length $N$ consisting of lowercase English letters, ,, and ".
• $S$ contains an even number of ".

Input

The input is given from Standard Input in the following format:

$N$

$S$

Output

Print the answer.

8
"a,b"c,d

"a,b"c.d

In $S$, "a,b" are enclosed characters, and c,d are not.

The , in $S$ that is not an enclosed character is the seventh character from the left in $S$, so replace that character with . to get the answer.

5
,,,,,

.....

20
a,"t,"c,"o,"d,"e,"r,

a."t,"c."o,"d."e,"r.