( @check 0 0 -1 1 -1 1 1 -1 )

s" " s" " compare print
s" abdde" s" abdde" compare print
s" abcde" s" abdde" compare print
s" abdde" s" abcde" compare print
s" abcde" s" abcdef" compare print
s" abcdef" s" abcde" compare print
s" abc" s" aBc" compare print
s" aBc" s" abc" compare print