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echo " a " | (read x; echo "$x.")
echo " a b " | ( read x y ; echo -"$x"-"$y"- )
echo " a b\ " | ( read x y ; echo -"$x"-"$y"- )
echo " a b " | ( read x ; echo -"$x"- )
echo " a b\ " | ( read x ; echo -"$x"- )
echo " a b\ " | ( read -r x y ; echo -"$x"-"$y"- )
echo " a b\ " | ( read -r x ; echo -"$x"- )
echo "\ a b\ " | ( read -r x y ; echo -"$x"-"$y"- )
echo "\ a b\ " | ( read -r x ; echo -"$x"- )
echo " \ a b\ " | ( read -r x y ; echo -"$x"-"$y"- )
echo " \ a b\ " | ( read -r x ; echo -"$x"- )
echo "A B " > /tmp/IN
unset x y z
read x y z < /tmp/IN
echo 1: "x[$x] y[$y] z[$z]"
echo 1a: ${z-z not set}
read x < /tmp/IN
echo 2: "x[$x]"
rm /tmp/IN
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