$ perl -MDevel::Peek -e "Dump $f=chr(400) "
SV = PV(0x3e69ec) at 0x98a414
  REFCNT = 1
  FLAGS = (POK,pPOK,UTF8)
  PV = 0x98419c "\306\220"\0 [UTF8 "\x{190}"]
  CUR = 2
  LEN = 4