#include <iostream>
using namespace std;
 
int main() {
	int a[7];
	a[0] = 1; a[1] = 2; a[2] = 3; a[3] = 4; a[4] = 5; a[5] = 6; a[6] = 3;
	char z[7] = {0};
	for (int i=0; i < 7;z[i]++,z[i]<3?i=a[i]:i++)
	   if (z[i] > 0) cout << (z[i]>1?  "\n":to_string(i) + " ");
 
	return 0;
}
				I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CglpbnQgYVs3XTsKCWFbMF0gPSAxOyBhWzFdID0gMjsgYVsyXSA9IDM7IGFbM10gPSA0OyBhWzRdID0gNTsgYVs1XSA9IDY7IGFbNl0gPSAzOwoJY2hhciB6WzddID0gezB9OwoJZm9yIChpbnQgaT0wOyBpIDwgNzt6W2ldKysseltpXTwzP2k9YVtpXTppKyspCgkgICBpZiAoeltpXSA+IDApIGNvdXQgPDwgKHpbaV0+MT8gICJcbiI6dG9fc3RyaW5nKGkpICsgIiAiKTsKIAoJcmV0dXJuIDA7Cn0=