#include <iostream>

struct stack {
	int obj[6] = {0, 0, 0, 0, 0, 0};
	int next = 0;
	int out[6] = {0, 0, 0, 0, 0, 0};
	int out_next = 0;
};

void out (stack s) {
	std::cout << "{ ";
	for (int i = 0; i < s.next; i++) std::cout << s.obj[i] << " ";
	std::cout << "// ";
	for (int i = 0; i < s.out_next; i++) std::cout << s.out[i] << " ";
	std::cout << "}" << std::endl;
}

void loop (stack s, int next) {
	
	if (s.out_next == 6) {
		for (int i = 0; i < s.out_next; i++) std::cout << s.out[i] << " ";
		std::cout << std::endl;
		return;
	}
	
	if (next < 7) {
		stack sn = stack(s);
		sn.obj[sn.next] = next;
		sn.next++;
		// std::cout << "[DBUG] way IN" << std::endl;
		// std::cout << "[DBUG][RA]" << s.out_next << std::endl;
		// std::cout << "[DBUG][XM]"; out(sn);
		loop(sn, next+1);
	}
	
	if (s.next != 0) {
		stack sb = stack(s);
		sb.out[sb.out_next] = sb.obj[sb.next-1];
		sb.obj[sb.next-1] = 0;
		sb.next--;
		sb.out_next++;
		// std::cout << "[DBUG] way OUT" << std::endl;
		// std::cout << "[DBUG][RA]" << s.out_next << std::endl;
		// std::cout << "[DBUG][XM]"; out(sb);
		loop(sb, next);
	}
	
}

int main () {
	
	loop (stack(), 1);
	
	std::cout << "over" << std::endl;
	
	return 0;
	
}