#include <cstdio>
#include <cstring>

char vet1[2000][11], vet2[2000][11];

void tisk(char *s)
{
  if (s[0] != '.')
    printf("%s ", s);
  else
    printf("%s", s);
}

int main()
{
  int del1, del2;
  for (;;)
  {/*    for (int i = 0; i < del1; i++) printf("%s ", vet1[i]);
    putchar('\n');
    for (int i = 0; i < del2; i++) printf("%s ", vet2[i]);*/

    del1 = 0;
    do
    {
      //del1++;
      scanf("%s", vet1[del1]);
    } while (vet1[del1++][0] != '.');
    
    if (del1 == 1) return 0;
    del2 = 0;
    do
    {
      scanf("%s", vet2[del2]);
    } while (vet2[del2++][0] != '.');
    
//     for (int i = 0; i < del1; i++) printf("%s ", vet1[i]);
//     putchar('\n');
//     for (int i = 0; i < del2; i++) printf("%s ", vet2[i]);

    int pos1 = 0, pos2 = 0;
    while(pos1 < del1 && pos2 < del2)
    {
      if (!strcmp(vet1[pos1], vet2[pos2]))
      {
        tisk(vet1[pos1]);
        pos1++;
        pos2++;
      }
      else
      {
        int i;
        int j;
        for (i = pos2 + 1; i < del2; i++)
        {
          if (!strcmp(vet1[pos1], vet2[i]))
          {
            break;
          }
        }
        for (j = pos1 + 1; j < del1; j++)
        {
          if (!strcmp(vet2[pos2], vet1[j]))
          {
            break;
          }
        }
        if ((i == del2 && j == del1) || (i != del2 && j != del1))
        {
          if (strcmp(vet1[pos1], vet2[pos2]) < 0)
          {
            printf("%s ", vet1[pos1]);
            pos1++;
          }
          else
          {
            printf("%s ", vet2[pos2]);
            pos2++;
          }
        }
        else if (i != del2)
        {
          printf("%s ", vet2[pos2]);
          pos2++;
        }
        else
        {
          printf("%s ", vet1[pos1]);
          pos1++;
        }
      }
    }
    putchar('\n');
  }
  return 0;
}