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v=`echo "" ; echo "" ; echo ""`
echo "'$v'"
v=`echo -n " ab "`
echo "'$v'"
v=`echo -n " "`
echo "'$v'"
v=`echo -n ""`
echo "'$v'"
v=`echo ""`
echo "'$v'"
v=`echo`
echo "'$v'"
v=`echo ababababababab`
echo "'$v'"
v=`echo "ababababababab "`
echo "'$v'"
v=`echo -n "ababababababab "`
echo "'$v'"
v=`echo -ne "abababa\nbababab "`
echo "'$v'"
v="`echo -e '\n\n\n\n'`"
echo "'$v'"
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