#include <bits/stdc++.h>
using namespace std;
#pragma comment(linker, "/STACK:102400000,102400000")
const long long INF = 1e18 + 1LL;
const double Pi = acos(-1.0);
const int N = 3e3 + 10, M = 1e3 + 20, mod = 2017, inf = 2e9;
int b[N][N], m, n, a[N][N];
vector<int> ans1, ans2, ans3, ans4;
int main() {
  scanf("%d%d", &n, &m);
  for (int i = 1; i <= n; ++i) {
    for (int j = 1; j <= m; ++j) scanf("%d", &a[i][j]), b[i][j] = a[i][j];
  }
  int fi = 0;
  for (int i = 1; i <= n; ++i) {
    int sum = inf;
    for (int j = 1; j <= m; ++j) {
      sum = min(sum, a[i][j]);
    }
    if (sum) {
      for (int j = 1; j <= sum; ++j) ans1.push_back(i);
      for (int j = 1; j <= m; ++j) a[i][j] -= sum;
    }
  }
  for (int i = 1; i <= m; ++i) {
    int sum = inf;
    for (int j = 1; j <= n; ++j) {
      sum = min(sum, a[j][i]);
    }
    if (sum) {
      for (int j = 1; j <= sum; ++j) ans2.push_back(i);
      for (int j = 1; j <= n; ++j) a[j][i] -= sum;
    }
  }
  fi = ans1.size() + ans2.size();
  for (int i = 1; i <= n; ++i) {
    for (int j = 1; j <= m; ++j) {
      if (a[i][j]) {
        puts("-1");
        return 0;
      }
    }
  }
  for (int i = 1; i <= m; ++i) {
    int sum = inf;
    for (int j = 1; j <= n; ++j) {
      sum = min(sum, b[j][i]);
    }
    if (sum) {
      for (int j = 1; j <= sum; ++j) ans4.push_back(i);
      for (int j = 1; j <= n; ++j) b[j][i] -= sum;
    }
  }
  for (int i = 1; i <= n; ++i) {
    int sum = inf;
    for (int j = 1; j <= m; ++j) {
      sum = min(sum, b[i][j]);
    }
    if (sum) {
      for (int j = 1; j <= sum; ++j) ans3.push_back(i);
      for (int j = 1; j <= m; ++j) b[i][j] -= sum;
    }
  }
  int se = ans3.size() + ans4.size();
  if (fi <= se) {
    cout << ans1.size() + ans2.size() << endl;
    for (int i = 0; i < ans1.size(); ++i) {
      cout << "row"
           << " " << ans1[i] << endl;
    }
    for (int i = 0; i < ans2.size(); ++i) {
      cout << "col"
           << " " << ans2[i] << endl;
    }
  } else {
    cout << ans3.size() + ans4.size() << endl;
    for (int i = 0; i < ans3.size(); ++i) {
      cout << "row"
           << " " << ans3[i] << endl;
    }
    for (int i = 0; i < ans4.size(); ++i) {
      cout << "col"
           << " " << ans4[i] << endl;
    }
  }
  return 0;
}
