#include <bits/stdc++.h>

#define fastio ios_base::sync_with_stdio(0); cin.tie(0);
#define int long long

using namespace std;

mt19937 rng(12334);

signed main(){
    fastio
    int n;
    cin >> n;
    vector<pair<int,int>> notebook = {{3,5}, {4,5}, {5,5}, {7,3}, {10,1}, {11,1}, {12,1}};
    vector<pair<int,int>> drawer = {{5,6},{6,6},{8,6},{13,4},{13,2},{14,2},{15,2}};

    int sz = 49;
    set<pair<int,int>> st;

    st.insert({49,49});
    while(st.size() <= n/7){
        int x = rng()%sz+1;
        int y = rng()%sz+1;
        st.insert({x,y});
    }

    for(auto [x,y] : st){
        for(auto [a,b] : notebook){
            cout << x*20 + a << " " << y*20 + b << "\n";
        }
    }

    for(int i = 0; i <= n%7; i++){
        cout << 1000 << " " << 1000-i << "\n";
    }

    cout << "\n";

    for(auto [x,y] : st){
        for(auto [a,b] : drawer){
            cout << x*20 + a << " " << y*20 + b << "\n";
        }
    }

    for(int i = 0; i <= n%7; i++){
        cout << 1000 << " " << 1000-i << "\n";
    }

}