#!/usr/bin/env bash

IFS=$' \t\n'
a="$(printf " a b , c d\n\t e f ")"
printf "a = "
printf "$a" | xxd

for i in $a ; do printf "$i" | xxd ; done

IFS=$'\t\n'
for i in $a ; do printf "$i" | xxd ; done

IFS=$', \t\n'
for i in $a ; do printf "$i" | xxd ; done

IFS=$', \n'
for i in $a ; do printf "$i" | xxd ; done