#include <bits/stdc++.h>
using namespace std;
template <class T>
T power(T a, T b) {
  T x;
  if (b == 0)
    x = 1;
  else
    x = a;
  for (size_t i = 1; i < b; i++) x *= a;
  return x;
}
long long int gcd(long long int a, long long int b) {
  return b == 0 ? a : gcd(b, a % b);
}
long long int n, m, a, b, c, ab, ba, x, y, z, avg, sum;
long long int arr2[101][101], arr3[200000], arr4[200001], arr5[100001];
char c2[1001][5];
bool f, f1, f2;
string str[50], s1, s2, s3, s4;
set<int> seto;
double d, d1;
long long int x1, x2, y11, y2;
long long int mini = 100000000000000, maxi = 0;
map<string, long long int> mp;
vector<long long int> v, v1;
int main() {
  cin >> n >> m;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m; j++) cin >> arr2[i][j];
  }
  if (n < m) {
    for (int i = 0; i < n; i++) {
      a = 100000000000000;
      for (int j = 0; j < m; j++) {
        if (arr2[i][j] < a) a = arr2[i][j];
      }
      if (a > 0) {
        for (int j = 0; j < m; j++) {
          arr2[i][j] -= a;
        }
        for (int j = 0; j < a; j++) v.push_back(i + 1);
      }
    }
    for (int i = 0; i < m; i++) {
      a = 100000000000000;
      for (int j = 0; j < n; j++) {
        if (arr2[j][i] < a) a = arr2[j][i];
      }
      if (a > 0) {
        for (int j = 0; j < n; j++) {
          arr2[j][i] -= a;
        }
        for (int j = 0; j < a; j++) v1.push_back(i + 1);
      }
    }
  } else {
    for (int i = 0; i < m; i++) {
      a = 100000000000000;
      for (int j = 0; j < n; j++) {
        if (arr2[j][i] < a) a = arr2[j][i];
      }
      if (a > 0) {
        for (int j = 0; j < n; j++) {
          arr2[j][i] -= a;
        }
        for (int j = 0; j < a; j++) v1.push_back(i + 1);
      }
    }
    for (int i = 0; i < n; i++) {
      a = 100000000000000;
      for (int j = 0; j < m; j++) {
        if (arr2[i][j] < a) a = arr2[i][j];
      }
      if (a > 0) {
        for (int j = 0; j < m; j++) {
          arr2[i][j] -= a;
        }
        for (int j = 0; j < a; j++) v.push_back(i + 1);
      }
    }
  }
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m; j++) {
      if (arr2[i][j]) {
        cout << -1;
        return 0;
      }
    }
  }
  cout << v.size() + v1.size() << endl;
  for (int i = 0; i < v.size(); i++) cout << "row " << v[i] << endl;
  for (int i = 0; i < v1.size(); i++) cout << "col " << v1[i] << endl;
}
