That means 1=A, 2=B, and so on until 26=Z. Although, you first have to minus the repeating code of 0.3.1.0.2.0.2.3, found in-game on the Cipher Quest menu, from each of the numbers before translating.

Operation Decode - Part II Procedure In Part I, you broke a simple cipher. Now try creating a more complex cipher. Cut out the NOVA Decoder Ring and NOVA Cipher Code Ring and the window marked INDEX.