#!/bin/bash
input="$1";

qwerty_response='ls';

block_start=\
'case "$input" in
	"asdf")			echo "asdf1" ;;'

case_lines=\
'	"qwerty")		"${qwerty_response}" ;;
	"asdf2")		echo "asdf2+2" ;;';

block_end='esac;';

case_block=$(echo "${block_start}
${case_lines}
${block_end}");

eval "$case_block";