B:--8----12---12-10--8--10--8--|-5-8-5--5---7- G:-----------------------------|----------7--- D:-----------------------------|-------------- A:-----------------------------|-------------- E:-----------------------------|-------------- Fig 2 x2 E:-----------------------------|-------------------------------------8-10-- B:--8----12---12-10--8--10--5--|-8----12---12-10--8--10--7-----10-12------- G:-----------------------------|------------------------------------------- D:-----------------------------|------------------------------------------- A:-----------------------------|------------------------------------------- E:-----------------------------|------------------------------------------- Fig1 Fig2