PROGRAMMING:Output non-repeating characters

Enter a string, and then pick out the 10 left-most non-repeating characters (case-sensitive characters). If the number of non-repeating characters is less than 10, output the actual number of characters.
### Input Format:
### Output Format:
### Sample Inputs1:
```in
Hello world, hello python
```
### Sample Output1:
```out
Helo wrd,h
```
### Sample Inputs2:
```in
succeed
```
### Sample Output2:
```out
suced
```







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