#include <cstdio>
#include <set>
#include <vector>

using namespace std;

int main (  )
{
	int trainees;
	vector< set < int > > groups;
	set<int> currentSet;
	while(scanf("%d\n", &trainees) == 1)
	{ 		
		groups.clear();
		for(int f = 0; f < trainees; ++f)
		{
			int flight;
			scanf("%d", &flight);
			currentSet.clear();
			while(flight)
			{
				int digit = flight % 10;
				flight /= 10;
				currentSet.insert(digit);
			}
			if(groups.size() == 0)
				groups.push_back(currentSet);
			bool found = false;
			for(int i = 0; i < groups.size(); ++i)
			{
				if(groups[i] == currentSet)
				{
					found = true;
					break;
				}
			}
			if(!found)
				groups.push_back(currentSet);
		}
		printf("%d\n", groups.size());
	}
	
	return 0;
}