
The Hollow Diamond
Your function should return a multiline string of unique lowercase letters in alphabetical order. The characters should be placed in a form of hollow rhombus (diamond), along its edges, starting from the top vertex.
For this purpose you are given three values (for their constraints see Preconditions):
- side - number of letters in each side of the rhombus;
- length - total number of letters you should use;
- cw - clockwise flag, which shows in what direction the letters must go (if true - letters should be placed in clockwise direction).
If it's not...
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