#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>
using namespace std;
string ss[11][11];
int h[256];
inline void error()
{
    puts("ERROR!");
    exit(0);
}
int main()
{
    int n;
    cin >> n;
    for (int i = 0; i < n; i++)
        for (int j = 0; j < n; j++)
            cin >> ss[i][j];
    memset(h, -1, sizeof(h));
    for (int i = 1, ans; i < n; i++)
    {
        ans = 0;
        for (int j = 1; j < n; j++)
            if (ss[i][j].size() > 1)
                ans++;
        if (h[(int)ss[i][0][0]] == -1) h[(int)ss[i][0][0]] = ans;
        if (h[(int)ss[i][0][0]] != ans) error();
    }
    for (int j = 1, ans; j < n; j++)
    {
        ans = 0;
        for (int i = 1; i < n; i++)
            if (ss[i][j].size() > 1)
                ans++;
        if (h[(int)ss[j][0][0]] != ans) error();
    }
    for (int i = 1; i < n; i++)
        printf("%c=%d ", ss[i][0][0], h[int(ss[i][0][0])]);
    printf("\n%d", n - 1);
    return 0;
}