#include <fstream>
#include <vector>
// #include "iostream"
using namespace std;
ifstream cin("games.in");
ofstream cout("games.out");
int e[105][105],m,n,Sum,s;
int ans_row[105],ans_col[105],K;
int cyf()
{	
	int i,j,k;
	cin >> n >> m;
	if(n<=m){
	for (i = 1; i <= n; ++i)
	{
		//int mi = 999999999;
		for (j = 1; j <= m; ++j)
		{
			cin >> e[i][j];
			Sum+=e[i][j];
		//	mi = min(mi,e[i][j]);
			/* code */
		}
		//e[i][0] = mi;
		/* code */
	}
	for (i = 1; i <= n; ++i)
	{
		int mi = 999999999;
		for (j = 1; j <= m; ++j)
		{
		//	cin >> e[i][j];
		//	Sum+=e[i][j];
			mi = min(mi,e[i][j]);
			/* code */
		}
		e[i][0] = mi;
		/* code */
	}
	for ( i = 1; i <= n; ++i)
	{
		if (e[i][0])
		{
			ans_row[i] = e[i][0];
			K += e[i][0];
			//for(k = 1;k <= e[i][0];k++)
			//{
			//	cout << "row " << i << endl;
			//}
			for (k = 1; k <= m; ++k)
			{
				e[i][k] -= e[i][0];
				/* code */
			}
			s += e[i][0]*m;
		}
	}
	if (s < Sum)
	{
		for (i = 1; i <= m; ++i)
		{
			int mi = 999999999;
			for (j = 1; j <= n; ++j)
			{
				mi = min(mi,e[j][i]);
				/* code */
			}
			e[0][i] = mi;
		}
		for ( j = 1; j <= m; ++j)
		{
			if (e[0][j])
			{
				ans_col[j] = e[0][j];
				K += e[0][j];
				//for(k = 1;k <= e[0][j];k++)
				//{
				//	cout << "col " << j << endl;
				//}
				s += e[0][j]*n;
			}
		}
		/* code */
	}
	if (s != Sum)
	{
		cout << -1 << endl;
		/* code */
	}
	else
	{
		cout << K << endl;
		for(i = 1;i <= n;i++)
		{
			if(ans_row[i])
			{
				for(k = 1;k <= ans_row[i];k++)
				{
					cout << "row " << i << endl;
				}
			}
		}
		for(i = 1;i <= m;i++)
		{
			if(ans_col[i])
			{
				for(k = 1;k <= ans_col[i];k++)
				{
					cout << "col " << i << endl;
				}
			}
		}
	}
	}
	else
	{
		
		for (i = 1; i <= n; ++i)
	{
		//int mi = 999999999;
		for (j = 1; j <= m; ++j)
		{
			cin >> e[i][j];
			Sum+=e[i][j];
		//	mi = min(mi,e[i][j]);
			/* code */
		}
		//e[i][0] = mi;
		/* code */
	}
for (i = 1; i <= m; ++i)
		{
			int mi = 999999999;
			for (j = 1; j <= n; ++j)
			{
				mi = min(mi,e[j][i]);
				/* code */
			}
			e[0][i] = mi;
		}
		for ( j = 1; j <= m; ++j)
		{
			if (e[0][j])
			{
				ans_col[j] = e[0][j];
				K += e[0][j];
				//for(k = 1;k <= e[0][j];k++)
				//{
				//	cout << "col " << j << endl;
				//}
				s += e[0][j]*n;
			}
		}
		/* code */
	if (s < Sum)
	{
			for (i = 1; i <= n; ++i)
	{
		int mi = 999999999;
		for (j = 1; j <= m; ++j)
		{
		//	cin >> e[i][j];
		//	Sum+=e[i][j];
			mi = min(mi,e[i][j]);
			/* code */
		}
		e[i][0] = mi;
		/* code */
	}
	for ( i = 1; i <= n; ++i)
	{
		if (e[i][0])
		{
			ans_row[i] = e[i][0];
			K += e[i][0];
			//for(k = 1;k <= e[i][0];k++)
			//{
			//	cout << "row " << i << endl;
			//}
			for (k = 1; k <= m; ++k)
			{
				e[i][k] -= e[i][0];
				/* code */
			}
			s += e[i][0]*m;
		}
	}
	}
	if (s != Sum)
	{
		cout << -1 << endl;
		/* code */
	}
	else
	{
		cout << K << endl;
		for(i = 1;i <= n;i++)
		{
			if(ans_row[i])
			{
				for(k = 1;k <= ans_row[i];k++)
				{
					cout << "row " << i << endl;
				}
			}
		}
		for(i = 1;i <= m;i++)
		{
			if(ans_col[i])
			{
				for(k = 1;k <= ans_col[i];k++)
				{
					cout << "col " << i << endl;
				}
			}
		}
	}
	}
	cin.close();	
	cout.close();
	return 0;
}
int hhhh = cyf();
int main() {;}