(a) The first column contains the permutations of the symmetric group on the alphabet and the second column contains their codes . (b) The first column contains the permutations of the symmetric group on the alphabet and the second column their codes . (c) The first column contains the permutations of the symmetric group on the alphabet and the second column contains their codes . This table easily allows to determine the codes for permutations on any other totally ordered four-letter alphabet, in particular the alphabet (), the genetic alphabet () and the alphabet (). For example, 211 is the code for 2130 on the alphabet , for on the alphabet and for on the alphabet .