st: how to add specific letter to string macro

[Oleksandr Shepotylo <shepotil@econ.umd.edu>]

Dear Statalist users,

Suppose that I have a local macro

loc X = " a  b  c"

I want to create a local macro

loc WX="wa wb wc"

The problem is that I want to automate the process and write a code that 
will create `WX' based on string stored in `X'.

Can anyone help me with this?

Thanks,

Oleksandr Shepotylo.
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