p03814 AtCoder Beginner Contest 053 - A to Z String
Snuke has decided to construct a string that starts with `A` and ends with `Z`, by taking out a substring of a string s (that is, a consecutive part of s).

Find the greatest length of the string Snuke can construct. Here, the test set guarantees that there always exists a substring of s that starts with `A` and ends with `Z`.

Constraints

* 1 ≦ |s| ≦ 200{,}000
* s consists of uppercase English letters.
* There exists a substring of s that starts with `A` and ends with `Z`.

Input

The input is given from Standard Input in the following format:


s


Output

Print the answer.

Examples

Input

QWERTYASDFZXCV


Output

5


Input

ZABCZ


Output

4


Input

HASFJGHOGAKZZFEGA


Output

12
```python
N = input()
a = N.find("A")
z = N.rfind("Z")
print(z - a + 1)
```