RRI	RNA-RNA interaction
CoM	compensatory mutation
MFE	minimum free energy
nt	nucleotide
ww, wm, mw, mm	sRNA-mRNA combinations of (w)ildtype and (m)utated variants
AUAU, AUCG, …	CoM classes where the first two letters encode the wildtype and the last two letters the mutated nts, e.g., AUCG encodes the mutation of either an AU or UA RRI base pair into either CG or GC