I need a tool to split my 45 second audio file on seconds: 3 6 8 12 14 17 20 23

Question

I need a tool to split my 45 second audio file on seconds: 3 6 8 12 14 17 20 23 25 27 30 33 36 38 41 43
Which software should I think of (GUI is preferred)? Is there any free?
Also note that it would be better not to specify these by keyboard (I mean giving numbers) I mean I wanna listen to this audio (It is a bunch of words in audio format) and each time the speaker finished saying a word I press for example SPACE from keyboard and the program records that point of time and this process continues until the end of the audio file and finally the program gives me for example 20 tiny mp3 files.
I wish I described clearly.

Explanation / Answer

Ubuntu has plenty of tools for this; many will also run on Windows.

A suitable command line tool is sox; for manipulating audio with a GUI I always use Audacity. Both are available for Windows. Audacity needs a separate plugin to support certain formats, such as MP3

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