In the group of letters ACEG the first letter is replaced by the letter one place ahead of it in the alphabet, the second by the letter two places ahead, the third by the letter three places ahead and the fourth by the letter four places ahead. What is the resulting group?

A (1st) one ahead gives B (2nd). C (3rd) two ahead gives E (5th). E (5th) three ahead gives H (8th). G (7th) four ahead gives K (11th). The group is BEHK. BDFH is the result of moving every letter one place ahead; CFIL of starting the growing step at two instead of one; BEHJ of taking the last step as three rather than four.