#include <iostream>
#include <fstream>

using namespace std;

int n,m;
int v[404];
bool ok[404];
int matrice[21][21];
bool caract[21][21];

int dx[]={1,0,-1,0};
int dy[]={0,-1,0,1};

void citire(){
    ifstream fin("spg.in");
    ofstream fout("spg.out");
    fin>>n>>m;
    cin>>v[0]>>v[1];
    int q=v[1]/v[0];
    if(v[0]*q!=v[1]){
        cout<<v[0]<<" "<<v[1];
        n=0;
        m=0;
    }
    for(int i=2;i<n*m;i++)
    {
        cin>>v[i];
        if(v[i]!=v[i-1]*q){
            cout<<v[i-1]<<" "<<v[i];
            i=500;
        }
    }

}
void bordare(){
    for(int i=0;i<=m+1;i++){
        caract[0][i]=caract[n+1][i]=1;
    }
    for(int i=0;i<=n+1;i++){
        caract[i][0]=caract[i][m+1]=1;
    }
}
void afisareBasic(){

for(int i=0;i<=n+1;i++){
    for(int j=0;j<=m+1;j++){
            cout<<caract[i][j];
        }
        cout<<endl;
    }
}
void genMat(){





}

/*void genMat(int x,int y, int dr,int i){
    if(i==n*m) return ;
    int xTest=x+dx[dr];
    int yTest=y+dy[dr];
    if(caract[xTest][yTest]==0)
    {
        caract[xTest][yTest]=1;
        matrice[xTest][yTest]=v[i++];
        genMat(xTest,yTest,dr,i);
    }
    else
    {
        dr++;
        if(dr>3)
            dr=1;
        genMat()
    }
}
*/
int main()
{
    citire();
    return 0;
}