set -- 0123456
	echo "all    |"$1
	echo "4:     |"${1:4}
	echo "4:2    |"${1:4:2}
	echo "4:-1   |"${1:4:-1}
	echo "4:-2   |"${1:4:-2}
	echo "4:-3   |"${1:4:-3}
	echo "-4:    |"${1: -4}
	echo "-4:2   |"${1: -4:2}
	echo "-4:-1  |"${1: -4:-1}
	echo "-4:-2  |"${1: -4:-2}
	echo "-4:-3  |"${1: -4:-3}
	echo "-4:-4  |"${1: -4:-4}
i=2;	echo "-4:i=2 |"${1: -4:i}
i=-2;	echo "-4:i=-2|"${1: -4:i}
i=-3;	echo "-4:i=-3|"${1: -4:i}
i=-4;	echo "-4:i=-4|"${1: -4:i}
	echo "-5:    |"${1: -5}
	echo "-6:    |"${1: -6}
	echo "-7:    |"${1: -7}
	echo "-8:    |"${1: -8}
	echo "-9:    |"${1: -9}
	echo "-9:-99 |"${1: -9:-99}
echo Ok:$?