PROGRAMMING:Output the first character of a word

This topic requires programming, input a line of characters, the first character of each word output. The so-called "word" refers to the continuous string without spaces. The words are separated by spaces, and the number of spaces can be multiple.
###Input format:
Enter to give a line of characters.
###Output format:
Output the first character of a word on a line. There is no space in the middle.
###Input example:
```in
How are you?
```
###Output example:
```out
Hay
```






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