#include <iostream>
#include <stdio.h>

using namespace std;

int arr[26];
int n;
int arr2[26];
string st;

int main()
{
    while(scanf("%d",&n)==1)
    {
        for(int i=0;i<n;i++)
        {
            cin >> st;
            for(int j=0;j<n;j++)
            {
                arr[st[j]-'A'] += 1;
                if(arr[st[j]-'A'] == 1)
                {
                    arr2[st[j]-'A'] = (i*1000+j);
                }
            }
            if(i == (n-1) || i==(n-2))
            {
                for(int j=0;j<n;j++)
                {
                if(arr[st[j]-'A'] != 1)
                {
                    arr2[st[j]-'A'] = 0;
                }
                }
            }
        }
        for(int i=0;i<26;i++)
        {
            if(arr2[i] != 0)
            {
                cout << ((arr2[i]/1000)+1)  << " " <<((arr2[i] % 1000)+1) << " ";
            }
            arr2[i] = 0;
        }
        for(int i=0;i<26;i++)
        {
            if(arr[i] == (n-1))
            {
                cout << (char)(i + 'A') << endl;
            }
            arr[i] = 0;
        }


    }
    return 0;
}