You are given a string
S exactly 9 characters long. Each character in the string is any of the digits from
0 to
9. All characters in the string are different. Print the missing digit in the string.
Input
The input is a string consisting of numbers.
Imprint
Display the answer to the problem
Examples
| # |
Input |
Output |
| 1 |
023456789
|
1
|
| 2 |
459230781
|
6
|