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#include <bits/stdc++.h>

using namespace std;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;

#ifdef LOCAL
ostream &operator<<(ostream &out, string str)
{
    for (char c : str)
        out << c;
    return out;
}
template <class L, class R>
ostream &operator<<(ostream &out, pair<L, R> p) { return out << "(" << p.first << ", " << p.second << ")"; }
template <class L, class R, class S>
ostream &operator<<(ostream &out, tuple<L, R, S> p)
{
    auto &[a, b, c] = p;
    return out << "(" << a << ", " << b << ", " << c << ")";
}
template <class T>
auto operator<<(ostream &out, T a) -> decltype(a.begin(), out)
{
    out << '{';
    for (auto it = a.begin(); it != a.end(); it = next(it))
        out << (it != a.begin() ? ", " : "") << *it;
    return out << '}';
}
void dump() { cerr << "\n"; }
template <class T, class... Ts>
void dump(T a, Ts... x)
{
    cerr << a << ", ";
    dump(x...);
}
#define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__)
#else
#define debug(...) 42
#endif

main()
{
    cin.tie(0)->sync_with_stdio(0);
    cin.exceptions(cin.failbit);

    int Z = 1;
    // cin >> Z;
    while (Z--)
    {
        int n, m;
        cin >> n >> m;
        vector<vi> G(n, vi(m));
        vector<vi> T(n + m, vi(26, 0));
        vi C(n + m, 0);
        for (auto &a : G)
        {
            string S;
            cin >> S;
            for (int i = 0; i < m; i++)
                a[i] = S[i] - 'A';
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                if (!T[i][G[i][j]])
                    C[i]++;
                T[i][G[i][j]]++;
            }
        }
        for (int j = 0; j < m; j++)
        {
            for (int i = 0; i < n; i++)
            {
                if (!T[j + n][G[i][j]])
                    C[j + n]++;
                T[j + n][G[i][j]]++;
            }
        }
        queue<int> Q;
        for (int i = 0; i < C.size(); i++)
            if (C[i] < 2)
                Q.push(i);
        vector<pii> ANS;
        while (Q.size())
        {
            if (!C[Q.front()])
            {
                Q.pop();
                continue;
            }
            int colour = -1;
            for (int i = 0; i < T[Q.front()].size(); i++)
                if (T[Q.front()][i])
                    colour = i;
            if (Q.front() >= n)
            {
                int it = Q.front() - n;
                for (int i = 0; i < n; i++)
                {
                    T[i][G[i][it]]--;
                    if (!T[i][G[i][it]])
                    {
                        C[i]--;
                        if (C[i] == 1)
                            Q.push(i);
                    }
                }
            }
            else
            {
                for (int j = 0; j < m; j++)
                {
                    T[j + n][G[Q.front()][j]]--;
                    if (!T[j + n][G[Q.front()][j]])
                    {
                        C[j + n]--;
                        if (C[j + n] == 1)
                            Q.push(j + n);
                    }
                }
            }
            ANS.push_back({Q.front(), colour});
            Q.pop();
        }
        reverse(all(ANS));
        cout << ANS.size() << endl;
        for (auto &[x, y] : ANS)
        {
            if (x >= n)
                cout << "K " << x - n + 1 << ' ' << char(y + 'A') << endl;
            else
                cout << "R " << x + 1 << ' ' << char(y + 'A') << endl;
        }
    }
}