If you need a clue ask the group to send you a letter to your private reply.
4 minutes good
3 minutes excellent
2 minutes exceptional
90 seconds superior
RTD RLNRT JDQHABI RH DKDLPHAD, JNR DLLHL FI HNLI YQHAD. - YULFDA-OYLFD QDBDAULD
Solution to previous puzzle (select the yellow text with your cursor to read):
THE TRUTH BELONGS TO EVERYONE, BUT ERROR IS OURS ALONE. - ADRIEN-MARIE LEGENDRE
HAL'S CRYPTOGRAM HELPER