The 3 letters of the word hat
plus one additional letter can create
many new valid English words e.g. heat, Utah
a. How many?
b. Same question for "hat+2": like yacht, Tahoe etc.
Rem: The additional letter(s) may be (not need to be) one(or two) of the h,a,t letters, in case b. nothing precludes adding twice the same letter.
(In reply to some computer findings
I notice that the count (ct) variable is not reinitialized to zero, so the count of 143 at the end includes the 36 from part a as well as the words in part b.
Posted by Charlie
on 2015-01-28 07:37:28