This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
typedef tuple<char,char,char,char,char,char> sexta;
map<sexta, int> dicio;
long long total;
string original;
int M, N;
inline sexta set_pos(sexta s, int pos, char c){
	if(pos == 0){
		return make_tuple(c, get<1>(s), get<2>(s), get<3>(s), get<4>(s), get<5>(s));
	}
	else if(pos == 1){
		return make_tuple(get<0>(s), c, get<2>(s), get<3>(s), get<4>(s), get<5>(s));
	}
	else if(pos == 2){
		return make_tuple(get<0>(s), get<1>(s), c, get<3>(s), get<4>(s), get<5>(s));
	}
	else if(pos == 3){
		return make_tuple(get<0>(s), get<1>(s), get<2>(s), c, get<4>(s), get<5>(s));
	}
	else if(pos == 4){
		return make_tuple(get<0>(s), get<1>(s), get<2>(s), get<3>(s), c, get<5>(s));
	}
	else if(pos == 5){
		return make_tuple(get<0>(s), get<1>(s), get<2>(s), get<3>(s), get<4>(s), c);
	}
	return s;
}
void brute_insert(int pos, sexta davez){
	if(pos == M){
		//cout << "Original: " << original << " Davez: " << davez << endl;
		dicio[davez]++;
		return;
	}
	if(original[pos] != '?'){
		brute_insert(pos+1, set_pos(davez, pos, original[pos]));
		brute_insert(pos+1, set_pos(davez, pos, '?'));
	}
	else{
		brute_insert(pos+1, set_pos(davez, pos, '!'));
	}
}
void brute_count(int pos, sexta davez){
	if(pos == M){
		//cout << "Original: " << original << " Davez: " << davez << endl;
		if(dicio.count(davez)) total += dicio[davez];
		return;
	}
	brute_count(pos+1, set_pos(davez, pos, original[pos]));
	brute_count(pos+1, set_pos(davez, pos, '!'));
}
int main(){
	sexta vazia = make_tuple('0', '0', '0', '0', '0', '0');
	cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0);
	cin >> N >> M;
	for(int i = 0; i < N; i++){
		cin >> original;
		brute_count(0, vazia);
		brute_insert(0, vazia);
	}
	cout << total << endl;
	return 0;
}
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