You are a software engineer at Google, and you have been tasked with writing a program that recognizes faces.

You will be given ~N~ strings. Output how many of them are exactly face.

Constraints

~1 \le N \le 10^5~

Each string is at least ~1~ and at most ~100~ characters long.

Input Specification

The first line contains a single integer, ~N~.

The next ~N~ lines each contain a string of lowercase letters.

Output Specification

Output a single line containing an integer, the number of faces.

Sample Input

6
desk
person
face
thefiveboxingwizardsjumpquickly
facet
face

Sample Output

2