#include<bits/stdc++.h>
using namespace std;
int n,m,a[250][250],x,s;
int main(){
cin>>n>>m;
for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
    cin>>a[i][j];
  }
}
for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
        x=a[i][j];
    while(a[i][j]!=0){
    	s=s*10a[i][j]%10;
    	a[i][j]=a[i][j]/10;
    }
    if(s==x) cout<<x<<endl;
  }
}
    return 0;
}
/**************************************************************
	Problem: 1403
	User: chenlingxuan
	Language: C++
	Result: Compile Error
****************************************************************/