#include <stdio.h>

void in (int Array[][10], int rows, int columns);
int calc (int Array[][10], int rows, int columns, int row_add_1, int row_add_2);
void out (int Array[][10], int rows, int columns);

main()
{
    int Array[10][10];
    int rows, columns, row_add_1, row_add_2;
    int mod_row_sum=0;
    
    scanf("%d%d%d%d", &rows, &columns, &row_add_1, &row_add_2); 

    in(Array, rows, columns);
    out(Array, rows, columns);
    
    mod_row_sum = calc(Array, rows, columns, row_add_1, row_add_2);
    
    printf("\n\n\nModified Array:\n");
    out (Array, rows, columns);
    printf("\n\n\nSum of elements in modified row: %d\n\n", mod_row_sum);
}

void in (int Array[][10], int rows, int columns)
{
    int i, j;
    
    for (i=0; i<rows; i++)
    {
	for (j=0; j<columns; j++)
	{
	    scanf("%d", &Array[i][j]);
	}
    }
}

int calc (int Array[][10], int rows, int columns, int row_add_1, int row_add_2)
{
    int i, sum=0;
    
    for (i=0; i<columns; i++)
    {
	Array[row_add_2][i]=Array[row_add_1][i]+Array[row_add_2][i];
	sum = sum + Array[row_add_2][i];
    }
    return sum;
}

void out (int Array[][10], int rows, int columns)
{
    int i, j;
    
    printf("\n\n");
    for (i=0; i<rows; i++)
    {
	for (j=0; j<columns; j++)
	{
	    printf("%2d ", Array[i][j]);
	}
	printf("\n");
    }
}