1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
#include <bits/stdc++.h>

using namespace std;

#define FOR(i, l, r) for(int i = (l); i <= (r); ++i)
#define REP(i, n) FOR(i, 0, (n) - 1)
#define rep(i, a, b) for(int i = a; i < (b); ++i)

#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define ssize(x) int(x.size())

#define pb push_back
#define fi first
#define se second
#define ld long double

typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef pair <ld, ld> pd;

using LL=long long;

#ifdef DEBUG
auto &operator<<(auto &o, pair<auto, auto> p) {
    return o << "()" << p.first << ", " << p.second <<")";
}
auto operator<<(auto &o, auto x)-> decltype(x.end(), o) {
    o << "{";int i = 0;
    for(auto e : x) o << ", "+!i++<<e;
    return o <<"}";
}
#define debug(x...) cerr << "["#x"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(x)
#else
#define debug(...) {}
#endif

const int MAXN = 2007;
int grid[MAXN][MAXN];
bool valid[MAXN][MAXN];
bool done_row[MAXN], done_col[MAXN];

int cnt_col[MAXN], cnt_row[MAXN];
int letter_col[MAXN][26], letter_row[MAXN][26];

struct Result {
    char who;
    int nr, col; 
    Result(char cwho, int cnr, int ccol) {
        this->who = cwho;
        this->nr = cnr;
        this->col = ccol;
    }
};

void solve() {
    int N, M;
    cin >> N >> M;

    REP(i, N)
        REP(j, M) {
            valid[i][j] = true;

            char letter;
            cin >> letter;
            
            int id = int(letter - 'A');
            grid[i][j] = id;

            letter_row[i][id]++;
            cnt_row[i] += (letter_row[i][id] == 1);

            letter_col[j][id]++;
            cnt_col[j] += (letter_col[j][id] == 1);
        }

    vector<Result> res;
    queue< pii > rows, cols;

    REP(i, N) {
        if (cnt_row[i] == 1) {
            done_row[i] = true;
            int which;
            REP(j, 26) 
                if(letter_row[i][j] > 0){
                    which = j;
                    break;
                }

            rows.push({i, which});
        }
    }

    REP(i, M) {
        if (cnt_col[i] == 1) {
            done_col[i] = true;
            int which;
            REP(j, 26) 
                if(letter_col[i][j] > 0){
                    which = j;
                    break;
                }

            cols.push({i, which});
        }
    }

    while(!rows.empty() || !cols.empty()) {
        while(!rows.empty()) {
            auto &[row, color] = rows.front();
            
            rows.pop();

            // bool ok = false;
            // if (!ok) continue;

            res.pb(Result('R', row, color));

            REP(j, M) {
                if (!valid[row][j]) continue;
                else valid[row][j] = false;

                letter_col[j][color]--;
                cnt_col[j] -= (letter_col[j][color] == 0);
                
                if (cnt_col[j] == 1 && !done_col[j]) {
                    done_col[j] = true;
                    int which;
                    REP(k, 26) 
                    if(letter_col[j][k] > 0){
                        which = k;
                        break;
                    }

                    cols.push({j, which});
                }
            }
        }


        while(!cols.empty()) {
            auto &[col, color] = cols.front();
            
            cols.pop();
            res.pb(Result('K', col, color));

            REP(j, N) {
                if (!valid[j][col]) continue;
                else valid[j][col] = false;

                letter_row[j][color]--;
                cnt_row[j] -= (letter_row[j][color] == 0);
                
                if (cnt_row[j] == 1 && !done_row[j]) {
                    done_row[j] = true;
                    int which;
                    REP(k, 26) 
                    if(letter_row[j][k] > 0){
                        which = k;
                        break;
                    }

                    rows.push({j, which});
                }
            }
        }
    }   

    cout << res.size() << '\n';
    reverse(all(res));
    for (auto result : res) {
        cout << result.who << ' ' << result.nr + 1 << ' ' << char(result.col + 'A') << '\n';
    }

}

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

    int t = 1;
    // cin >> t;
    while(t--) {
        solve();
    }
}