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#include<cstdio>
#include<vector>

using namespace std;

int main()
{	
	int n,m,a,b;
	char c;
	scanf("%d %d",&n,&m);
	for(int i=0;i<m;++i)
	{
		scanf("%d %d %c",&a,&b,&c);

	}
	printf("NIE\n");
	return 0;
}