In English, when one encounters "q", it is almost certain that the next letter will be a "u".
I am looking for a similar situation in Chinese. Is there a character A which is universally (or nearly universally) followed by some other character B?
This question might be of limited linguistic interest, so let me give the context: I'm teaching a course on information theory where questions like this show up (think: effective text compression, for example). Most of the students are Chinese so I think it would be fun to include a Chinese example. My preference is for a well-known example where anyone with basic Chinese will be able to produce B when presented with A.