#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, a, b, c;
  cin >> n >> a >> b >> c;
  VVI g(n, VI(n));
  if (a >= n || c >= n || n == 2) {
    bool flip = c >= n;
    if (flip) swap(a, c);
    rep(i, n) rep(j, n) {
      if (b) b--, g[i][j] = 2;
      else if (a) a--, g[i][j] = 1;
      else c--, g[i][j] = 3;
      if (flip && g[i][j] != 2) g[i][j] ^= 2;
    }
  } else if (n == 3 && a == 2 && c == 2) {
    rep(i, 3) rep(j, 3) g[i][j] = 2;
    g[0][0] = g[0][1] = 1;
    g[1][0] = g[1][1] = 3;
  } else {
    rep(i, n) rep(j, n) {
      if (a) a--, g[i][j] = 1;
      else if (b) b--, g[i][j] = 2;
      else c--, g[i][j] = 3;
    }
  }
  rep(i, n) {
    rep(j, n) cout << g[i][j];
    cout << '\n';
  }
}