What Does It Mean When Banks Sit in a Central Bank?

Large amounts of this money, 90 billion, i think, she sitting in theethe bunde central bank. They're just like, right, that's ours. And if we come back to the banking thing, because they can't access it, they can't get it,. It's just as uts been locked up. We can i in what form are they sitting inup for people who don't understand this? So what does it mean when serves are in a bank somewhere over seas? How is that affected? I wanted to ask you.