Discrete Math
posted by Francesca on .
Can someone help? Very confused. . .
John Sununus was once the governor of New Hampshire, and his name reminds one of the authors of a palindrome (a words which is spelt the same way forwards as backwards, such as SUNUNUS).
How many sevenletter palindromes (not necessarily real words) begin with the letter S and contain at most three letter?
Thanks for any helpful replies!

See response to previous post:
http://www.jiskha.com/display.cgi?id=1302642083