PROGRAMMING:Output non duplicate characters

Enter a string and pick out the 10 non repeating characters on the leftmost side (different case characters). If there are less than 10 characters that are not repeated, the output will be based on the actual number.
###Input format:
Enter a string s.
###Output format:
Output a string containing 10 non duplicate characters on the leftmost side of string s. Less than 10 by actual output.
###Input sample 1:
Here is a set of inputs. For example:
```in
Hello world, hello python
```
###Output sample 1:
The corresponding output is given here. For example:
```out
Helo wrd,h
```
###Input sample 2:
Here is a set of inputs. For example:
```in
succeed
```
###Output sample 2:
The corresponding output is given here. For example:
```out
suced
```







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