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// clang-format off
// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
using namespace std;
template<class Fun>
class y_combinator_result {
    Fun fun_;
public:
    template<class T> explicit y_combinator_result(T &&fun): fun_(forward<T>(fun)) {}
    template<class ...Args> decltype(auto) operator()(Args &&...args) { return fun_(ref(*this), forward<Args>(args)...); }
};
template<class Fun> decltype(auto) y_combinator(Fun &&fun) { return y_combinator_result<decay_t<Fun>>(forward<Fun>(fun)); }
// using namespace __gnu_pbds;
// template <typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifdef XOX
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) { ris << "(" << d.first << ", " << d.second << ")"; }
sim dor(rge<c> d) { *this << "["; for (auto it = d.b; it != d.e; ++it) *this << ", " + 2 * (it == d.b) << *it; ris << "]"; }
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
struct { template <class T> operator T() { T x; cin >> x; return x; } } in;
#define endl '\n'
#define pb emplace_back
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
using i64 = long long;
template <class T> using vt = vector<T>;
template <class T, size_t n> using ar = array<T, n>;
namespace R = ranges;
auto ra(auto x, auto y) { return R::iota_view(x, y); }
// #define int long long
// clang-format on

struct S {
    char a;
    int b;
    char c;
    S(char aa, int bb, char cc) : a(aa), b(bb), c(cc) {}
};

void solve() {
    int n = in, m = in;
    vt<vt<vt<int>>> cnt(2);
    vt<vt<int>> cntdiff(2);
    cnt[0].resize(n, vt<int>(26)), cnt[1].resize(m, vt<int>(26));
    cntdiff[0].resize(n), cntdiff[1].resize(m);
    vt<vt<char>> a(n, vt<char>(m));
    for (int r : ra(0, n)) {
        for (int c : ra(0, m)) {
            char ch = in;
            a[r][c] = ch;
            if (++cnt[0][r][ch - 'A'] == 1) cntdiff[0][r]++;
            if (++cnt[1][c][ch - 'A'] == 1) cntdiff[1][c]++;
        }
    }
    vt<S> print;
    queue<pair<int, int>> q;
    auto solo = [&](int r, int i) {
        return cntdiff[r][i] == 1;
    };
    for (int r : ra(0, 2)) {
        for (int i : ra(0, n)) {
            if (solo(r, i)) q.emplace(i, r);
        }
        swap(n, m);
    }
    while (sz(q)) {
        auto [i, r] = q.front();
        q.pop();
        if (!cntdiff[r][i]) continue;
        char L = 'X';
        for (int j : ra(0, 26)) {
            if (cnt[r][i][j] > 0) {
                L = j + 'A';
                break;
            }
        }
        print.pb(S{r ? 'K' : 'R', i, L});
        cntdiff[r][i] = 0;
        if (!r) swap(n, m);
        r ^= 1;
        for (int j : ra(0, n)) {
            if (--cnt[r][j][L - 'A'] == 0) cntdiff[r][j]--;
            if (solo(r, j)) q.emplace(j, r);
        }
        r ^= 1;
        if (!r) swap(n, m);
    }
    assert(sz(print) <= n + m);
    reverse(all(print));
    cout << sz(print) << endl;
    for (auto [c, i, t] : print) {
        cout << c << " " << i + 1 << " " << t << endl;
    }
#ifdef DEBUG
    vt<vt<char>> x(n, vt<char>(m, '?'));
    for (auto [c, i, t] : print) {
        if (c == 'R') {
            for (int j : ra(0, m))
                x[i][j] = t;
        } else {
            for (int j : ra(0, n))
                x[j][i] = t;
        }
    }
    assert(x == a);
#endif
}

int32_t main() {
    cin.tie(0)->sync_with_stdio(0);
    int t = 1;
    // int t = in;
    while (t--) {
        solve();
    }
}