#include <iostream>
using namespace std;
int main(){
int filas = 9;
int i;
int j;
for (i = 1; i <= filas; ++i){
if ( i != 1 ) cout << i;
for (j = i+1; j <= (2 * i - 1); ++j){
cout << j;
}
for (j = (2 * i - 2); j >= i+1 ; --j){
cout << j;
}
cout << i << endl;
}
}