How to play the vertical bar in the name of crossing the line of fire? What input method is used?

The correct answer is to type HHL under the five-stroke input method.

I'm out. What?

Although smart ABC hit that vertical line, it will prompt that special symbols are not allowed, so it is useless.

You can also play YYLL with five strokes

Come out.

You can also play OYY.

Come out