In accordance with , {HEAD ~ HDD} 20 are preferentially connected to row 3 among rows 1 to 3 and then {TAIL ~ HDD} 20 are preferentially connected to row 2 
In accordance with , { HEAD ~ HDD } 20 are preferentially connected to row 3 among rows 1 to 3 and then { TAIL ~ HDD } 20 are preferentially connected to row 2
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH