the left mouse button [...] left corner [...] left corner

left corner [...] ) of the upper left corner [...] left corner

left corner [...] ) of the upper left corner [...] left corner

is the upper left corner [...] left corner [...] ) of the upper left corner

left corner [...] left corner [...] ) of the upper left corner

left corner [...] left corner [...] ) of the upper left corner

left corner [...] ) of the upper left corner [...] left corner

left corner [...] ) of the upper left corner [...] left corner

left corner [...] ) of the upper left corner [...] left corner

left corner [...] ) of the upper left corner [...] left corner