D. Certainly
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

Dr. Mehta, a professor of the Algorithms course at Colorado School of Mines, has recently observed an increase in students using generative AI to do their homework for them. He noticed that reports generated by AI tend to use certain words more than usual, especially the word "certainly". Dr. Mehta wants your help spotting dubious submissions!

Given a student's report, count the number of times the word "certainly" appears.

Input

The input consists of a single line containing a string $$$s$$$ ($$$10 \leq |s| \leq 10^{4}$$$), consisting only of lowercase English letters, spaces (' '), and periods ('.').

Output

Print one integer, the number of times the word "certainly" appears in $$$s$$$.

Examples
Input
certainly. i can help you with that.
Output
1
Input
hello world
Output
0
Input
certainlycertainlycertainlycertainly
Output
4