>>423
#include <stdio.h>
#include <string.h>
int main() {
  char Buf[101] = "";
  int i, Len;
  for (i = 0; i < sizeof Buf; i++) {
    int ch = getchar();
    Buf[i] = ch;
    if (ch == EOF || !strcmp(Buf + i - 2, "end"))
      break;
  }
  Len = strlen(Buf);
  for (i = 0; i < Len; i += 2)
  putchar(Buf[i]);
  return 0;
}