#include <vector>
#include <string>
#include <iostream>

using namespace std;

vector<string> vc, tmpa, tmpb;

bool nactiVstup(vector<string>* a, vector<string>* b) {
	string tmp;
	cin >> tmp;
	if (tmp == ".")
		return false;
	while (tmp != ".") {
		a->push_back(tmp);
		cin >> tmp;
	}
	cin >> tmp;
	while (tmp != ".") {
		b->push_back(tmp);
		cin >> tmp;
	}
	return true;
}

void vypisVystup(vector<string>* v) {
	for(vector<string>::iterator it = v->begin(); it < v->end(); it++)
		cout << *it << " ";
	cout << "." << endl;
}

void emptyTmp() {
	vector<string>::iterator it;

	while (!tmpa.empty() && !tmpb.empty()) {
		if (tmpa.front() < tmpb.front()) {
			vc.push_back(tmpa.front());
			tmpa.erase(tmpa.begin());
		} else {
			vc.push_back(tmpb.front());
			tmpb.erase(tmpb.begin());
		}
	}
	for (it = tmpa.begin(); it < tmpa.end(); it++)
		vc.push_back(*it);
	tmpa.clear();
	for (it = tmpb.begin(); it < tmpb.end(); it++)
		vc.push_back(*it);
	tmpb.clear();
}

int main() {
	vector<string> va, vb;
	vector<string>::iterator it;
	string a, b, tmp;
	int da, db, x;
	
	while (nactiVstup(&va, &vb)) {
		vc.clear();
		tmpa.clear();
		tmpb.clear();
		while (!va.empty() && !vb.empty()) {
			a = va.front(); va.erase(va.begin());
			b = vb.front(); vb.erase(vb.begin());
			if (a == b) {
				emptyTmp();
				vc.push_back(a);
			} else {
				da = 0;
				db = 0;
				x = 1;
				for (it = va.begin(); it < va.end(); it++, x++)
					if (*it == b) {
						da = x;
						break;
					}
				x = 1;
				for (it = vb.begin(); it < vb.end(); it++, x++)
					if (*it == a) {
						db = x;
						break;
					}

				if ((da != 0) && (db != 0))
					if (da < db)
						db = 0;
					else
						da = 0;
				if ((da != 0) || (db != 0))
					emptyTmp();

				if ((da == 0) && (db == 0)) {
					tmpa.push_back(a);
					tmpb.push_back(b);
				} else if (da == 0) {
					vc.push_back(b);
					for (int i = 0; i < db; i++) {
						tmp = vb.front(); vb.erase(vb.begin());
						vc.push_back(tmp);
					}
				} else if (db == 0) {
					vc.push_back(a);
					for (int i = 0; i < da; i++) {
						tmp = va.front(); va.erase(va.begin());
						vc.push_back(tmp);
					}
				}
			}
		}
		// dopsat zbytek tmpa a tmpb
		emptyTmp();
		// dopsat zbytek a|b
		for (it = va.begin(); it < va.end(); it++)
			vc.push_back(*it);
		va.clear();
		for (it = vb.begin(); it < vb.end(); it++)
			vc.push_back(*it);
		vb.clear();
		// vypsat vysledek
		vypisVystup(&vc);
	}	

	return 0;
}