#D7035. Ace It!
Ace It!
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
inputFormat
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").
outputFormat
Output
Output a single integer.
Examples
Input
A221033
Output
21
Input
A223635
Output
22
Input
A232726
Output
23
样例
A232726
23