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

char*mmap();

char a[410000];
main(){
	char*rp=mmap(0l,4l*200000+7,1,2,0,0ll);
	char* i=a+205000;
	char* j=a+205000;
	while(*rp++!=10);
	do{
		*(rp[0]&1?--i:j++)=rp[2];
		rp+=4;
	}while(*rp);
	write(1,i,j-i);
}