It makes use of the memory function of the lastkey key value. It's quite good. The inability to locate the specific value is a defect of the registry.
@set c= 不知则觉多,知则觉少,越知越多,便觉越来越少. --- 知多少.
@for,/l,%%i,in,(1,1,55)do,@call,set/p=%%c:~%%i,1%%<nul&ping/n 1 127.1>nul
@for,/l,%%i,in,(1,1,55)do,@call,set/p=%%c:~%%i,1%%<nul&ping/n 1 127.1>nul