#include <bits/stdc++.h>
using namespace std;
vector<pair<string, int> > v, v1;
int main() {
  int s = 0;
  int n, m;
  cin >> n >> m;
  int row[n];
  int col[m];
  int row1[n];
  int col1[m];
  fill(row, row + n, 600);
  fill(col, col + m, 600);
  fill(row1, row1 + n, 600);
  fill(col1, col1 + m, 600);
  int a[n][m];
  int a1[n][m];
  int ans1 = 0;
  int ans2 = 0;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m; j++) {
      cin >> a[i][j];
      a1[i][j] = a[i][j];
      s += a[i][j];
    }
  }
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m; j++) {
      row[i] = min(row[i], a[i][j]);
      row1[i] = row[i];
    }
  }
  for (int i = 0; i < m; i++) {
    for (int j = 0; j < n; j++) {
      col[i] = min(col[i], a[j][i]);
      col1[i] = col[i];
    }
  }
  for (int i = 0; i < n; i++) {
    if (row[i] == 0) continue;
    for (int k = 0; k < row[i]; k++) v.push_back(make_pair("row", (i + 1)));
    for (int j = 0; j < m; j++) {
      a[i][j] -= row[i];
      ans1 += (row[i]);
      col[j] = min(col[j], a[i][j]);
    }
  }
  for (int i = 0; i < m; i++) {
    if (col[i] == 0) continue;
    for (int k = 0; k < col[i]; k++) v.push_back({"col", (i + 1)});
    for (int j = 0; j < n; j++) {
      a[j][i] -= col[i];
      ans1 += (col[i]);
      row[j] = min(row[j], a[j][i]);
    }
  }
  for (int i = 0; i < m; i++) {
    if (col1[i] == 0) continue;
    for (int k = 0; k < col1[i]; k++) v1.push_back({"col", (i + 1)});
    for (int j = 0; j < n; j++) {
      a1[j][i] -= col1[i];
      ans2 += (col1[i]);
      row1[j] = min(row1[j], a1[j][i]);
    }
  }
  for (int i = 0; i < n; i++) {
    if (row1[i] == 0) continue;
    for (int k = 0; k < row1[i]; k++) v1.push_back(make_pair("row", (i + 1)));
    for (int j = 0; j < m; j++) {
      a1[i][j] -= row1[i];
      ans2 += (row1[i]);
      col1[j] = min(col1[j], a1[i][j]);
    }
  }
  if (ans1 == s && ans2 == s) {
    if (v.size() <= v1.size()) {
      cout << v.size() << endl;
      for (int i = 0; i < v.size(); i++)
        cout << v[i].first << " " << v[i].second << endl;
    } else {
      cout << v1.size() << endl;
      for (int i = 0; i < v1.size(); i++)
        cout << v1[i].first << " " << v1[i].second << endl;
    }
  } else if (ans1 == s) {
    cout << v.size() << endl;
    for (int i = 0; i < v.size(); i++)
      cout << v[i].first << " " << v[i].second << endl;
  } else if (ans2 == s) {
    cout << v1.size() << endl;
    for (int i = 0; i < v1.size(); i++)
      cout << v1[i].first << " " << v1[i].second << endl;
  } else
    cout << -1 << endl;
}
