#include "bits/stdc++.h"

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using LL = long long;

int r, c;
string s;
int a[2005][2005];
vector<int> ans;
int h[2005][2005];
pair<int, int> p[2005][2005];
int qa[55][55];
unordered_map<LL, pair<int, int>> M;

int sw(char c) {
	if (c >= '0' && c <= '9') {
		return c - '0';
	}
	return c - 'A' + 10;
}

int H(int r1, int c1, int r2, int c2) {
	return qa[r2][c2] ^ qa[r1 - 1][c2] ^ qa[r2][c1 - 1] ^ qa[r1 - 1][c1 - 1];
}

int tonum(string s) {
	int a0 = sw(s[0]);
	int a1 = sw(s[1]);
	return a0 * 16 + a1;

}

string st(int x) {
	string s;
	if (x > 9) s += (x - 10 + 'A');
	else s += (x + '0');
	return s;
}

string tostring(int num) {
	int a0 = num / 16;
	int a1 = num % 16;
	return st(a0) + st(a1);
}

void encode() {
	cin >> r >> c;
	ans.push_back(r / 256);
	ans.push_back(r % 256);
	ans.push_back(c / 256);
	ans.push_back(c % 256);
	for (int i = 1; i <= r; i++) {
		for (int j = 1; j <= c; j++) {
			cin >> s;
			int num = tonum(s);
			a[i][j] = num;
		}
	}
	int ilen = 3;
	for (int i = 1; i + ilen - 1 <= r; ) {
		int jlen = 3;
		for (int j = 1; j + jlen - 1 <= c; ) {
			int x = 0;
			for (int ii = i; ii < i + ilen; ii++) {
				for (int jj = j; jj < j + jlen; jj++) {
					x ^= a[ii][jj];
				}
			}
			ans.push_back(x);
			if (x == 180) {
				cout << "get 180 from: \n";
				for (int ii = i; ii < i + ilen; ii++) {
					for (int jj = j; jj < j + jlen; jj++) {
						cout << a[ii][jj] << " ";
					}
					cout << endl;
				}
			}
			j += jlen;
			jlen = 7 - jlen;
		}
		i += ilen;
		ilen = 7 - ilen;
	}
	cout << (int)ans.size() << "\n";
	for (int i = 0; i < ans.size(); i++) {
		cout << tostring(ans[i]);
		cout << " \n"[i == ans.size() - 1];
	}
}

void decode() {
	int n;
	cin >> n;
	string s1, s2, s3, s4;
	cin >> s1 >> s2 >> s3 >> s4;
	int a1 = tonum(s1), a2 = tonum(s2), a3 = tonum(s3), a4 = tonum(s4);
	r = a1 * 256 + a2;
	c = a3 * 256 + a4;
	cout << "r and c : " << r << " " << c << endl;
	int i = 1, j = 1, ilen = 3, jlen = 3;
	int hi = 1, hj = 1;
	for (int t = 5; t <= n; t++) {
		string s;
		cin >> s;
		if (j + jlen - 1 > c) {
			i += ilen;
			j = 1;
			hi++;
			hj = 1;
			ilen = 7 - ilen;
			jlen = 3;
		}
		h[hi][hj] = tonum(s);
		p[hi][hj] = {i, j};
		hj++;
		j += jlen;
		jlen = 7 - jlen;
	}
	cout << "hashed array size: " << hi << " " << hj << endl;
	for (int i = 1; i <= hi; i++) {
		for (int j = 1; j <= hj; j++) {
			cout << h[i][j] << " ";
		}
		cout << endl;
	}
	for (int i = 1; i < hi; i++) {
		for (int j = 1; j < hj; j++) {
			ll num = h[i][j];
			num = num * 256 + h[i][j + 1];
			num = num * 256 + h[i + 1][j];
			num = num * 256 + h[i + 1][j + 1];
			M[num] = p[i][j];
		}
	}
	int q;
	cin >> q;
	for (int qi = 1; qi <= q; qi++) {
		int qr, qc;
		cin >> qr >> qc;
		for (int j = 1; j <= qr; j++) {
			for (int k = 1; k <= qc; k++) {
				string tmp;
				cin >> tmp;
				int num = tonum(tmp);
				qa[j][k] = num;
			}
		}
		for (int i = 1; i <= qr; i++) {
			for (int j = 1; j <= qc; j++) {
				qa[i][j] = qa[i][j] ^ qa[i][j - 1] ^ qa[i - 1][j] ^ qa[i - 1][j - 1];
			}
		}
		pair<int, int> position;
		for (int i = 1; i <= 4; i++) {
			for (int j = 1; j <= 4; j++) {
				LL num = H(i, j, i + 2, j + 2);
				num = num * 256 + H(i, j + 3, i + 2, j + 6);
				num = num * 256 + H(i + 3, j, i + 6, j + 2);
				num = num * 256 + H(i + 3, j + 3, i + 6, j + 6);
				if (M.find(num) != M.end()) {
					auto pr = M[num];
					position.first = pr.first - i + 1;
					position.second = pr.second - j + 1;
				}
			}
		}
		for (int i = 1; i <= 4; i++) {
			for (int j = 1; j <= 4; j++) {
				LL num = H(i, j, i + 2, j + 3);
				num = num * 256 + H(i, j + 4, i + 2, j + 6);
				num = num * 256 + H(i + 3, j, i + 6, j + 3);
				num = num * 256 + H(i + 3, j + 4, i + 6, j + 6);
				if (i == 1 && j == 3) {
					cout << "to get " << H(i, j, i + 2, j + 3) << ", from:\n";
					for (int ii = i; ii <= i + 2; ii++) {
						for (int jj = j; jj <= j + 3; jj++) {
							cout << (qa[ii][jj] ^ qa[ii - 1][jj] ^ qa[ii][jj - 1] ^ qa[ii - 1][jj - 1]) << " ";
						}
						cout << endl;
					}
					cout << H(i, j, i + 2, j + 3) << " ";
					cout << H(i, j + 4, i + 2, j + 6) << endl;
					cout << H(i + 3, j, i + 6, j + 3) << " ";
					cout << H(i + 3, j + 4, i + 6, j + 6) << endl;
				}
				if (M.find(num) != M.end()) {
					auto pr = M[num];
					position.first = pr.first - i + 1;
					position.second = pr.second - j + 1;
				}
			}
		}
		for (int i = 1; i <= 4; i++) {
			for (int j = 1; j <= 4; j++) {
				LL num = H(i, j, i + 3, j + 2);
				num = num * 256 + H(i, j + 3, i + 3, j + 6);
				num = num * 256 + H(i + 4, j, i + 6, j + 2);
				num = num * 256 + H(i + 4, j + 3, i + 6, j + 6);
				if (M.find(num) != M.end()) {
					auto pr = M[num];
					position.first = pr.first - i + 1;
					position.second = pr.second - j + 1;
				}
			}
		}
		for (int i = 1; i <= 4; i++) {
			for (int j = 1; j <= 4; j++) {
				LL num = H(i, j, i + 3, j + 3);
				num = num * 256 + H(i, j + 4, i + 3, j + 6);
				num = num * 256 + H(i + 4, j, i + 6, j + 3);
				num = num * 256 + H(i + 4, j + 3, i + 6, j + 6);
				if (M.find(num) != M.end()) {
					auto pr = M[num];
					position.first = pr.first - i + 1;
					position.second = pr.second - j + 1;
				}
			}
		}
		cout << position.first << " " << position.second << "\n";
	}
}
 
int32_t main() {
	cin.tie(0)->sync_with_stdio(0);
	cout << fixed << setprecision(10);
	string s;
	cin >> s;
	if (s[0] == 'm') {
		encode();
	}
	else {
		decode();
	}
	
}