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

int main()
{
  char s1[1000], s2[1000];
  char *osszefuz(char *, char *);

  while (gets(s1), gets(s2) != NULL)
  {
    char *p = osszefuz(s1, s2);
    puts(p);
    free(p);
  }
  return EXIT_SUCCESS;
}