The executable mmsyn7h is auxilary for the mmsyn7ukr package
(https://hackage.haskell.org/package/mmsyn7ukr). 
It works similarly to the mmsyn6ukr executable, but uses the voice 
sound files in the current directory. This allows to change the 
needed files and to produce them by some other means (e. g. by 
mmsyn7ukr).
Besides, you can remove the created by mmsyn7ukr and mmsyn7h files
while the last one is running, if you specified just one command line 
argument. 
If you specify the second command line argument "s" and then 
a list of @String@ represented the Ukrainian sounds, then 
the program will use only these sounds representations 
additionally to the default ones "-.wav", "0.wav" and "1.wav".
In such a case the program will not delete the created resulting 
sound files.