The test suite does not check that the solution is a character string, but the problem definition requires that it should.
Added this check. (I messed it up a bit the first time I tried to do it, so sorry for some interim weirdness.)
str = num2str(A,formatSpec), could replace '
Invalid solution, really
New test suite invalidates this solution.
Find the alphabetic word product
Colon operator of two vectors
Insert zeros into vector
factorial of a number x
Are you in or are you out?
Sum My Indices
All your base are belong to us
Factorize THIS, buddy
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