CF656G.You're a Professional

A simple recommendation system would recommend a user things liked by a certain number of their friends. In this problem you will implement part of such a system.

You are given user's friends' opinions about a list of items. You are also given a threshold $T$ — the minimal number of "likes" necessary for an item to be recommended to the user.

Output the number of items in the list liked by at least $T$ of user's friends.

The first line of the input will contain three space-separated integers: the number of friends $F$ ( $1<=F<=10$ ), the number of items $I$ ( $1<=I<=10$ ) and the threshold $T$ ( $1<=T<=F$ ).

The following $F$ lines of input contain user's friends' opinions. $j$ -th character of $i$ -th line is 'Y' if $i$ -th friend likes $j$ -th item, and 'N' otherwise.

Output an integer — the number of items liked by at least $T$ of user's friends.