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#include <bits/stdc++.h>
using namespace std;

#define REP(i, n) for (int i = 0; i < (int)n; i++)
#define ST first
#define ND second
#define MP make_pair
#define PB push_back

typedef vector<int> VI;
typedef pair<int, int> PII;
typedef vector<PII> VPII;
typedef set<int> SI;
typedef long long LL;

#ifdef DEBUG
const bool debug = true;
#else
const bool debug = false;
#endif

// #define MULTI_TASK true

const int INF = 1000 * 1000 * 1000;
const LL INFLL = 1e18;
const int MAKSN = 2000 + 13;
const int ALP_SIZE = 30;
const LL MOD = 123456789LL;
LL N, M, k, l, a, b, c, d;
string s;
vector<string> v;

int rows_cnt[MAKSN][ALP_SIZE], cols_cnt[MAKSN][ALP_SIZE];
int rows_sub[ALP_SIZE], cols_sub[ALP_SIZE];

bool row_deleted[MAKSN], cols_deleted[MAKSN];

vector<tuple<char, int, char> > answers;

void zeruj() {
    v.clear();
}

int ord(char c) {
    return c - 'A';
}

void readIn() {
    cin >> N >> M;
    REP(i, N) {
        cin >> s;
        v.PB(s);
    }

    REP(i, N) {
        REP(j, M) {
            rows_cnt[i][ord(v[i][j])] += 1;
            cols_cnt[j][ord(v[i][j])] += 1;
        }
    }
}

bool is_single_color(int cnts[], int deduct[]) {
    int colors_cnt = 0;
    for (int i = 0; i < ALP_SIZE; i++) {
        if (cnts[i] - deduct[i] != 0)
            colors_cnt += 1;
    }

    return colors_cnt == 1;
}

int find_color(int cnts[], int deduct[]) {
    for (int i = 0; i < ALP_SIZE; i++) {
        if (cnts[i] - deduct[i] != 0)
            return i;
    }
    return -1;
}

void printState() {
    for(int i = 0; i < N; i++) {
        cerr << "R " << i << ": ";
        for (int j = 0; j < ALP_SIZE; j++) {
            if (rows_cnt[i][j])
                cerr << char(j + 'A') << rows_cnt[i][j] - cols_sub[j] << ",  ";
        }
        if(row_deleted[i])
            cerr << "Deleted ";
        cerr << "\n";
    }
    cerr << "\n\n";
    for(int i = 0; i < M; i++) {
        cerr << "C " << i << ": ";
        for (int j = 0; j < ALP_SIZE; j++) {
            if (cols_cnt[i][j])
                cerr << char(j + 'A') << cols_cnt[i][j] - rows_sub[j] << ",  ";

        }
        if(cols_deleted[i])
            cerr << "Deleted ";
        cerr << "\n";
    }
    cerr << "\n\n";
}

void solve() {
    while (true) {
        char typ;
        int nr = -1, color;

        for (int i = 0; i < N; i++) {
            if (row_deleted[i])
                continue;

            if (is_single_color(rows_cnt[i], cols_sub)) {
                typ = 'R';
                color = find_color(rows_cnt[i], cols_sub);
                nr = i;
                row_deleted[i] = true;
                rows_sub[color] += 1;
                break;
            }
        }
        if (nr == -1) {
            for (int i = 0; i < M; i++) {
                if (cols_deleted[i])
                    continue;

                if (is_single_color(cols_cnt[i], rows_sub)) {
                    typ = 'K';
                    color = find_color(cols_cnt[i], rows_sub);
                    nr = i;
                    cols_deleted[i] = true;
                    cols_sub[color] += 1;
                    break;
                }
            }
        }

        if (nr == -1)
            break;
        answers.emplace_back(typ, nr, char(color + 'A'));
    }
    reverse(answers.begin(), answers.end());

    cout << answers.size() << "\n";
    for (auto t : answers) {
        cout << get<0>(t) << " " << get<1>(t) + 1 << " " << get<2>(t) << "\n";
    }
}

int main() {
    ios_base::sync_with_stdio(0);
#ifdef MULTI_TASK
    int test;
    cin >> test;
    while (test--) {
#endif
        zeruj();
        readIn();
        solve();
#ifdef MULTI_TASK
    }
#endif
    return 0;
}




// AAPAA
// APPAA
// AAPAA
// AAPAA
// APPPA