#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);
	int i=205000;
	int j=205000;
	while(*rp++!=10);
	do{
		a[rp[0]&1?--i:j++]=rp[2];
		rp+=4;
	}while(*rp);
	write(1,a+i,j-i);
}