Tricky Cangjie characters: exceptions and hard-to-split characters
You can get the Cangjie code for most characters by following the rules, but there are a few exceptions. In some the tangled part is too hard to split stroke by stroke, so Cangjie uses the 難 code (the X key) in its place. Others are exceptions with fixed codes you simply memorize. And some are connected characters that are hard to divide at all. The tables below group common tricky Cangjie characters into these three kinds.
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The 難 code: for parts too tangled to split
When a component is too complex to split stroke by stroke, Cangjie replaces that stretch with the 難 code (the X key).
Exceptions with fixed codes you memorize
These characters have fixed, exceptional codes that do not follow the usual splitting. Composite characters take only head and tail; special characters have overlapping parts coded another way.
Connected characters you cannot easily split
These characters are written as one connected whole, with strokes that run into each other, so it is hard to see where to cut. Their Cangjie codes are often unintuitive, so it is most practical to learn each one.