How to push a string to the bottom of a string in Bootstrap 4?

Question

css

Nothing works, I've tried everything.
You need to do this:

Is there a solution?
PS Where , then there is a dynamic height, that's the problem. Not always 400. height:400px

Answer 1

For a block with a height of 100px, I made css:

#last-top > .row > .col-12:last-child {
  position: absolute;
  bottom: 0;
}

I just started learning Bootstrap, I thought, suddenly there is something ready