#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

char*mmap();

char wbuf[20<<20];

#define HASHSIZE (1<<20)
char* hashtbl[HASHSIZE];
int hashmul;

int hashf(char*s){
	int h=0;
	char*p=s;
	while(*p>=64){
		h=h*hashmul+*p;
		++p;
	}
	int a=h>>20|1;
	h&=HASHSIZE-1; 
	while(1){
		if(!hashtbl[h]){
			hashtbl[h]=s;
			return 1;
		}
		if(memcmp(hashtbl[h],s,p-s)==0 && hashtbl[h][p-s]<64){
			return 0;
		}
		h=h+a&HASHSIZE-1;
	}
}

char*bs[200000];

main(){
	hashmul=time(0)|1;
	char*rp=mmap(0l,1l<<28,1,2,0,0ll);
	while(*rp++!=10);
	int n=0;
	do{
		hashf(rp);
		while(*rp++>=64);
		bs[n++]=rp;
		while(*rp++>=64);
	}while(*rp);
	char*wp=wbuf;
	for(int i=0;i<n;++i){
		char*p=bs[i];
		if(hashf(p)){
			while((*wp++=*p++)>=64);
		}
	}
	write(1,wbuf,wp-wbuf);
	_exit(0);
}