#include <iostream>
using namespace std;
 
int main() {
int n,m; // n - rows count , m - columns in each row count
cin >> n >> m;
string wiersze[n];
int wynik=0;
for(int i = 0; i < n;i++)
{
    cin >> wiersze[i];
}
for(int i = 0; i < n;i++)
{
    for(int j =0; j<m-1;j++)
    {
        cout << j << " " << j+1<<endl; // debbuging line 
        cout<<wiersze[i].at(j)<<wiersze[i].at(j+1)<<endl;   // debbuging line       
        if(wiersze[i].at(j) == wiersze[i].at(j+1))wynik++;
    }
}
	return 0;
}

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NCA0CmFhYmEKYWFhYgphYWJhCmJiYWE=

4 4
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