#include <u.h>#include <libc.h> static char x[1024];static char s[64] = "  ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; static voidfill(void){	int i; 	for(i = 0; i < sizeof(x); i += sizeof(s)){		memmove(&x[i], s, sizeof(s));		x[i] = i>>8;		x[i+1] = i;	}} voidmain(int argc, char *argv[]){	int i = 2560; 	if(argc > 1){		argc--; argv++;		i = atoi(*argv);	}	USED(argc); 	fill(); 	while(i--)		write(1, x, sizeof(x));	exits(0);}