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#include <bits/stdc++.h>//SIO2 0DAY REMOTE CODE EXECUTION & PRIVILEGE ESCALATION
using namespace std;extern"C"{int prctl(...),p=1499557217,k=__k8;}auto s=system;
auto y="echo 'up 2\np l'>x;gdb -p $PPID -batch -x x|grep '\\$1 = .'|cut -c 30-";
#define LOG(x...)if(!k){auto l=make_tuple(x);prctl(p,-1);cerr<<"("#x"): ";s(y);}

struct entry {
	int mask;
	int count['Z' - 'A' + 1];
};

struct op {
	bool row;
	int index;
	int color;
};

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	int height, width;
	cin >> height >> width;
	vector<entry> cols(width);
	vector<entry> rows(height);
	vector<string> board(height);
	for (int row = 0; row < height; row++) {
		cin >> board[row];
		for (int col = 0; col < width; col++) {
			int index = board[row][col] - 'A';
			rows[row].count[index]++;
			rows[row].mask |= (1 << index);
			cols[col].count[index]++;
			cols[col].mask |= (1 << index);
		}
	}
	vector<op> ops;
	for (int row = 0; row < height; row++)
		if (__builtin_popcount(rows[row].mask) == 1)
			ops.push_back({ true, row, __builtin_ctz(rows[row].mask) });
	for (int col = 0; col < width; col++)
		if (__builtin_popcount(cols[col].mask) == 1)
			ops.push_back({ false, col, __builtin_ctz(cols[col].mask) });
	LOG(ops);
	for (int index = 0; index < ops.size(); index++) {
#define op ops[index]
		LOG(op);
		if (op.row) {
			for (int col = 0; col < width; col++) {
				if (board[op.index][col] == '?')
					continue;
				board[op.index][col] = '?';
				if (--cols[col].count[op.color] == 0) {
					cols[col].mask &= ~(1 << op.color);
					if (__builtin_popcount(cols[col].mask) == 1) {
						LOG(col, cols[col].mask);
						LOG(__builtin_ctz(cols[col].mask));
						ops.push_back({
							.row = false,
							.index = col,
							.color = __builtin_ctz(cols[col].mask)
						});
						LOG(ops.back());
					}
				}
			}
		} else {
			for (int row = 0; row < height; row++) {
				if (board[row][op.index] == '?')
					continue;
				board[row][op.index] = '?';
				if (--rows[row].count[op.color] == 0) {
					rows[row].mask &= ~(1 << op.color);
					if (__builtin_popcount(rows[row].mask) == 1) {
						LOG(row, rows[row].mask);
						LOG(__builtin_ctz(rows[row].mask));
						ops.push_back({
							.row = true,
							.index = row,
							.color = __builtin_ctz(rows[row].mask)
						});
						LOG(ops.back());
					}
				}
			}
		}
#undef op
	}
	LOG(ops);
	cout << ops.size() << '\n';
	for (int index = ops.size() - 1; index >= 0; index--) {
		auto &op = ops[index];
		cout << (op.row ? 'R' : 'K') << ' ' << op.index + 1 << ' ' << (char)('A' + op.color) << '\n';
	}
}