#include <iostream>
using namespace std;

int main() {
    int A[3][4] = {
    {4,1,2,6},
    {15,3,9,7},
    {20,11,8,10},
};

    int B[4][4] = {
    {5,4,3,2},
    {8,6,1,9},
    {2,6,1,5},
    {3,7,8,4},
    };

    int result[3][4];
    for(int i=0;i<3;i++)
        {
            for(int j=0;j<4;j++)
                {
                    int sum=0;
                    for(int k=0;k<4;k++)
                        {
                            sum+=A[i][k] * B[k][j];
                        }
                    result[i][j]=sum;
                    cout<<result[i][j]<<" ";
                }
            cout<<endl;
        }

    

    
    return 0;
}