#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
using ll = long long;
#define SZ(v) (ll)((v).size())
#define pb emplace_back
#define AI(i) begin(i), end(i)
#define X first
#define Y second
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
int main() {
  cin.tie(nullptr)->sync_with_stdio(false);

  int p, q;
  cin >> p >> q;

  // p / q <= 2 / 3
  if (p * 3 <= q * 2) {
	  string pat;
	  for (int i = 0; i < p; i++)
		  pat += "##.";
	  for (int i = 0; i < q * 2 - 3 * p; i++)
		  pat += ".";
	  cout << 1 << ' ' << pat.size() << '\n';
	  cout << pat << '\n';
	  return 0;
  }
  else if (p * 5 > q * 4){
  	  cout << "-1 -1\n";
  }
  else if (p * 5 == q * 4){
	  cout << "5 5\n";
	  cout << ".####\n";
	  cout << "###.#\n";
	  cout << "#.###\n";
	  cout << "####.\n";
	  cout << "##.##\n";
	  return 0;
  }
  else if (p * 4 == q * 3){
  	  cout << "4 4\n";
	  cout << ".###\n";
	  cout << ".###\n";
	  cout << "##.#\n";
	  cout << "##.#\n";
  }
  else if (p * 10 == q * 7){
  	  cout << "4 5\n";
	  cout << ".####\n";
	  cout << ".####\n";
	  cout << "##..#\n";
	  cout << "##..#\n";
  }
  else if (p * 7 == q * 5){
	  cout << "6 7\n";
	  cout << "..##.##\n";
	  cout << "..##.##\n";
	  cout << "####.##\n";
	  cout << "##.###.\n";
	  cout << "##.###.\n";
	  cout << "####.##\n";
  }
  else if (p * 9 == q * 7) {
	  cout << "18 6\n";
	  vector<string> a(3);
	  a[0] = "#####.";
	  a[1] = "###.##";
	  a[2] = "..####";
	  for (int i = 0; i < 18; i++) {
		  auto s = a[i % 3];
		  rotate(s.begin(), s.begin() + i / 3, s.end());
		  cout << s << '\n';
	  }
  }
  else {
	  cout << "-1 -1\n"; 
  }
  return 0;
}