$ perl -MEncode -E'
   say sprintf "%v02X",
      encode "UTF-8", decode "cp1252", encode "UTF-8", chr
         for 0x00C1, 0x00CD, 0x00CF, 0x00D0, 0x00DD;
'
C3.83.EF.BF.BD
C3.83.EF.BF.BD
C3.83.EF.BF.BD
C3.83.EF.BF.BD
C3.83.EF.BF.BD