Search in the English dictionary the words that complete the alphametic
sequences + sequences = ?
in such a way the solution is unique.
There are several possible solutions,- provide the one with a minimal value of s+e+q+u+n+c.
(In reply to Not only one!
by Dej Mar)
"A good problem, to be rated 3 or higher, should not rely on a computer."
While this might be your personal opinion, I beg to differ:
IMHO "2" implies lack of elegance.