#include <iostream>

using namespace std;

int main() {
    int a[3] = {0, 1, 2};
    
    int i = 0, n = 3;
    
    for(i = 0 ; i < n - 1; i++){
        cout << a[i] <<" " << a[i+1]<< endl;
    }
    
    cout << "*****************************" << endl;
    
    for(i = 1; i < n ; i++){
        cout << a[i-1] << " " << a[i] << endl;  
    }
}