#include <iostream>
#include <string.h>
using namespace std;

int main()
{
	int N, M;
	while( cin >> N ){
		cin >> M;
		bool cup[ 4 ];
		memset( cup, 0, sizeof(cup) );
		cup[ N ] = true;
		for( int i = 0; i < M; ++i ){
			int P, Q;
			cin >> P >> Q;
			bool t = cup[ P ];
			cup[ P ] = cup[ Q ];
			cup[ Q ] = t;
		}
		for( int i = 1; i < 4; ++i ){
			if( cup[ i ] ) cout << i << endl;
		}
	}

	return 0;
}