ABSTRACT
Let’s go simultaneously from both ends of the infi nity line taking two letters at every step (left + right). We can see the next pairs: SE, MI, HO, DA, WE, MO, YE, CE, MI. Th ese pairs are the fi rst letters in the following words that mean diff erent time periods starting from the shortest: SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, YEAR, CENTURY, MILLENNIUM , …. Th e fi nal one can be ETERNITY, so the two letters replacing the question marks are E and T.
