use v5.10;
use Data::Dumper;
use Devel::Peek;

print unpack "C*",'Köln';
Dump 'Köln';

75 195 182 108 110
#note that ö has been mapped as two bytes extended ascii values 195 #and 182

SV = PV(0x27c7b54) at 0x8eef84
  REFCNT = 1
  FLAGS = (PADTMP,POK,READONLY,pPOK)
  PV = 0x8f4724 "K\303\266ln"\0
  CUR = 5
  LEN = 8