>single-base scoring matrix: A C G U A 1 -1 -1 -1 C -1 1 -1 -1 G -1 -1 1 -1 U -1 -1 -1 1 >base-pair scoreing matrix: AU CG GC GU UA UG AU 3 1 1 1 1 1 CG 1 3 1 1 1 1 GC 1 1 3 1 1 1 GU 1 1 1 3 1 1 UA 1 1 1 1 3 1 UG 1 1 1 1 1 3