What is the ditloid solution to - 3 b on a w in c?

The ditloid "3 b on a w in c" stands for "3 blind mice on a wall in Canterbury." This is a playful phrase that uses the format of a ditloid, where numbers and personalized wooden alphabet letters (wiki.roboco.co) represent words in a well-known phrase or title.
In this case, it refers to the nursery rhyme about three blind mice.