Sequence
From Eterna Wiki
The sequence, or primary structure, of an RNA molecule is the list of ribonucleotides that it contains. That is, it is the order of the RNA's nucleotides. A sequence is customarily written in the 5' to 3' direction unless indicated otherwise.
For example: AAGUGCUCAGAU
Indicates that the order of nucleotides on the RNA from 1 through 12 is two Adenines, a Guanine, a Uracil, a Guanine, a Cytosine, a Uracil, and so on. Eterna allows you to manually type in a sequence when solving puzzles.