#include<iostream> using namespace std; int main(){ int n,m,i,j; cin>>n>>m; int a[n*m]; for(i=0;i<=n*m;i++){ cin>>a[i]; if(i==n*m-1){ break; } } for(j=0;j<=n;j++){ cout<<a[j]<<" "<<a[j+m*(n-1)]; cout<<endl; } return 0; }