import java.io.*;

public class MatrixGames {
	public static FileReader fr;
	public static BufferedReader br;
	public static PrintWriter pw;
	
	public static void main (String [] args) throws Exception {
		fr = new FileReader("matrix.txt");
		br = new BufferedReader(fr);
		pw = new PrintWriter(System.out, true);
		
		String str; // general holder for stuff being read
		int numIntMatrices;
		IntMatrix [] matrices = new IntMatrix[10000]; // super large, but will be pruned shortly
		for (str = br.readLine(), numIntMatrices = 0; str != null ; str = br.readLine(), numIntMatrices++ ) {
			if (str.equals("<begin matrix>")) { // so this assumes we've read the line "<being matrix>"
				matrices[numIntMatrices] = new IntMatrix(IntMatrix.readMatrix(br));
			}
			else {
				numIntMatrices--; // since we just read in junk in this pass of the loop!
			}
		} // end for loop to read the matrices from the file
		matrices = trimArray(matrices);
		
		for(int j = 0; j<matrices.length; j++) {
			pw.println(matrices[j]);
		}
		
	} // end main method
	
	public static IntMatrix[] trimArray (IntMatrix [] m) {
		int size; // to hold the actual number of matrices there
		for ( size = 0 ; m[size] != null ; size++ ) {  } // merely finding the size!!
		IntMatrix [] temp = new IntMatrix[size];
		for (int i=0; i<temp.length; i++)
			temp[i] = m[i];
		return temp;
	}
	
	
}