A. Hello, ACMer!
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

Today, we are happy to invite so many good friends. IHI has just written a long string to celebrate this great party. How many occurrences of "hznu" as a continuous substring are there in the long string? Please write a program to count the number.

Input

The only line contains a non-empty string, consisting of no more than $$$100\,000$$$ lowercase Latin letters, 'a' to 'z'.

Output

Output a line containing a single integer, indicating the number of occurrences of "hznu" in the given string.

Examples
Input
hznu
Output
1
Input
hhzznnuu
Output
0