#include <stdio.h>
#include <string.h>

int main(int argc, char **argv) {
char line[256], lastcanon[256], lastword[256], *word;
  strcpy(lastcanon, "*Undefined*");
  for (;;) {
    if (gets(line) == NULL) break;
    if ((word = strchr(line, '=')) == NULL) break;
    *word++ = '\0';
    if (strcmp(line, lastcanon) == 0) {
      printf("%s = %s\n", lastword, word);
    }
    strcpy(lastcanon, line);
    strcpy(lastword, word);
  }
  return(0);
}