I got a list of over 1000 channel names and I want to retrieve their ids

For example:
This channel: Blammo_McDammo
https://www.youtube.com/chanel/UCWKnCfobDJ08zOOYM3_h-EA

has an id: UCWKnCfobDJ08zOOYM3_h-EA

I need that UCWKnCfobDJ08zOOYM3_h-EA for all the channels in my list in a text format