How to list the most recent grades without + or -.


LIST STU GRD CRS STU.ID STU.NM STU.GR GRD.M2 CRS.CO CRS.DC? CRS.S1? (( IIF( GRD.M2 = "A" OR GRD.M2 = "A-" OR GRD.M2 = "A+","A", IIF( GRD.M2 = "B" OR GRD.M2 = "B-" OR GRD.M2 = "B+","B", IIF( GRD.M2 = "C" OR GRD.M2 = "C-" OR GRD.M2 = "C+","C", IIF( GRD.M2 = "D" OR GRD.M2 = "D-" OR GRD.M2 = "D+","D", IIF( GRD.M2 = "F" OR GRD.M2 = "F-" OR GRD.M2 = "F+","F", "NM") ) ) ) ) ))  IF GRD.M2 # " "