#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(int argc,char **argv) {
  static unsigned short v1[4096*4];
  static unsigned short v2[4096*4];

  fread(v1,sizeof(unsigned short),4096*4,stdin);
  fread(v2,sizeof(unsigned short),4096*4,stdin);
  fwrite(v1,sizeof(unsigned short),4096*2,stdout);
  fwrite(v2,sizeof(unsigned short),4096*2,stdout);

 exit(0);
}