byte2dec() {
 printf "%s" "$1"|
 od -A n -t d1|
 tr -s "[:blank:]" "\n"|
 tail -n +2|
 while read i;do
  echo "$i"|
  awk '/^[^-]/{printf("%03d ", $0);};\
       /^-/{print 256-substr($1,2)}'|
  tr "[:space:]" " ";
 done
}