656_F. Ace It!


Input

The only line of the input is a string of 7 characters. The first character is letter A, followed by 6 digits. The input is guaranteed to be valid (for certain definition of "valid").

Output

Output a single integer.

Examples

Input

A221033


Output

21


Input

A223635


Output

22


Input

A232726


Output

23
```python
s = input()
ans = 1

for i in s[1:]:
    x = int(i)
    if x == 0:
        x = 9
    ans += x
    
print(ans)    
    

      

```