FIX last_letter compute method
FIX last_letter compute method

ecino/compassion-modules,ecino/compassion-modules,eicher31/compassion-modules,ecino/compassion-modules,CompassionCH/compassion-modules,CompassionCH/compassion-modules,eicher31/compassion-modules,eicher31/compassion-modules,ecino/compassion-modules,eicher31/compassion-modules,ecino/compassion-modules,eicher31/compassion-modules,CompassionCH/compassion-modules,CompassionCH/compassion-modules