$ ./1.pl
string is G�del
SV = PV(0x556af89dcda0) at 0x556af8a06fa0
  REFCNT = 1
  FLAGS = (POK,IsCOW,pPOK,UTF8)
  PV = 0x556af8a2d730 "G\303\266del"\0 [UTF8 "G\x{f6}del"]
  CUR = 6
  LEN = 10
  COW_REFCNT = 1
string is �ber
SV = PV(0x556af89dcda0) at 0x556af8a06fa0
  REFCNT = 1
  FLAGS = (POK,IsCOW,pPOK,UTF8)
  PV = 0x556af8a124e0 "\303\274ber"\0 [UTF8 "\x{fc}ber"]
  CUR = 5
  LEN = 10
  COW_REFCNT = 1
string is alle�
SV = PV(0x556af89dcda0) at 0x556af8a06fa0
  REFCNT = 1
  FLAGS = (POK,IsCOW,pPOK,UTF8)
  PV = 0x556af89f9eb0 "alle\303\237"\0 [UTF8 "alle\x{df}"]
  CUR = 6
  LEN = 10
  COW_REFCNT = 1
$