p02812 AtCoder Beginner Contest 150 - Count ABC
We have a string S of length N consisting of uppercase English letters.

How many times does `ABC` occur in S as contiguous subsequences (see Sample Inputs and Outputs)?

Constraints

* 3 \leq N \leq 50
* S consists of uppercase English letters.

Input

Input is given from Standard Input in the following format:


N
S


Output

Print number of occurrences of `ABC` in S as contiguous subsequences.

Examples

Input

10
ZABCDBABCQ


Output

2


Input

19
THREEONEFOURONEFIVE


Output

0


Input

33
ABCCABCBABCCABACBCBBABCBCBCBCABCB


Output

5
```python
n = input()
print(input().count('ABC'))
```