1st part 3x [-----------------------------------------------] [-----------------------------3-7-----3-7-------] [-13-14-13-14-13-14-9-12-10-7-----7-9-----9-10--] [-----------------------------------------------] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2nd part [-----------------------------------------------] [-----------------------------------------------] [-12-10-9-7-9-10-12-14-15-14-12-14-12-10-12-10-9] [-----------------------------------------------]