Write a method to **replace all the spaces in a string S with ‘%20’**. You may assume that the string has sufficient space (or allocated memory) at the end to hold the additional characters,

**Note: **The leading and trailing spaces should be trimmed off and not replaced by %20.

**Input:**

The first line of input contains an integer **T** denoting the number of test cases. The** T** test cases follow. Each test case contains two lines of input. The first line contains a string** S**. The next line contains an integer** K** that denotes the length of the S with whitespace included.

**Output:**

For each testcase, in a new line, print the string with spaces replaced by **"%20"**.

**Constraints:**

1 <= T <= 1000

1 <= |S|+ K <= 1000

**Example:
Input:**

2

Mr John Smith

13

Mr Benedict Cumberbatch

25

**Output:**

"Mr%20John%20Smith"

"Mr%20Benedict%20Cumberbatch

**Explanation:**

Here in the second case 25 means that there are 25 characters taken into input. While the length of the string is 23 , it means that there are 2 extra spaces at the end which needs to be removed and is contained in input. So the output should be those 23 characters with 2 extra spaces removed and spaces between word replaced with %20.

Author: Ayush Govil 1

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