#include <stdio.h>

int main(void)
{
  int x[10000];
  int xlen = 0;
  int n;
  int i;
  int j;

  while (scanf("%d",&n) == 1) {
    if (xlen >= 10000) continue; /* avoid buffer overflow */
    x[xlen] = n;
    ++xlen;
  }

  for (j = 0;j < 2;++j)
    for (i = 0;i < xlen;++i)
      printf("%d\n",x[i]);

  return 0;
}