For each of the transistors 51 0 to 51 3, one end of the current paths connects to the selecting gate lines SGDI0 to SGDI3 of the corresponding block BLK0, the other ends are connected to signal lines SGD0 to {TAIL ~ SGD3}, and signals TG are assigned to {HEAD ~ the gate} 
For each of the transistors 51 0 to 51 3 , one end of the current paths connects to the selecting gate lines SGDI0 to SGDI3 of the corresponding block BLK0 , the other ends are connected to signal lines SGD0 to { TAIL ~ SGD3 } , and signals TG are assigned to { HEAD ~ the gate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD