A new video about the recent developments in coding has been published on the HackerEarth social media handle. After some time, it is seen that there are N comments added. The admin wants to see if there are any derogatory comments. Hence, he searched the comment section with a keyword S.

Task

Give the count of the comments that will be returned as a result of the search.

Notes

The count can be 0.
The algorithm searches the keyword irrespective of the case of the word.
The separator here is “_”.

Example 1

Assumptions

Input

N = 3
S = “hate”
comments = [“The_video_is_good”, “I_hate_this”, “Informative”]

Output: 1

Approach

Only the second comment contains the word “hate”.

Function description

Complete the function solution() provided in the editor. The function takes the following 3 parameters and returns the solution:

N: Represents the number of comments
S: Represents the keyword
comments: Represents the array of comments

Input format

Note: This is the input format that you must use to provide custom input (available above the Compile and Test button).

The first line contains N denoting the number of comments.
The second line contains S denoting the keyword.
Each of the next N lines contains a string denoting a comment.

Output format

Print an integer representing the number of comments containing the keyword.

Constraints

\(1 \le N \le 10^5 \\ 1 \le |S| \le 10 \\ 1 \le Sum\: of\: length\: of\: all\: comments \le 10^5 \\ S\: and\: comments\: contain\: only\: lower\: and\: upper\: case\: latin\: characters\: and\: underscores\)