Problem
Given a string S consisting of words separated by spaces, print the first character of each word, in order, without spaces.
Input format
Input
input.txt
- String S (up to 100 chars, may contain spaces)
Output format
Output
output.txt
- First character of each word, as a single string
Example
input
hello open ai
output
hoa
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Sample cases (from the problem)
Sample Case 1
Input
hello open ai
Expected output
hoa
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