proj1

def fill(fmap, x, y, color, fill_color, map_size):
    if x < 0 or x >= map_size or y < 0 or y >= map_size:
        return
    if fmap[x][y] == color:
            fmap[x][y] = fill_color
            fill(fmap, x+1, y, color, fill_color, map_size)
            fill(fmap, x-1, y, color, fill_color, map_size)
            fill(fmap, x, y+1, color, fill_color, map_size)
            fill(fmap, x, y-1, color, fill_color, map_size)


f = open("bitmap.in", "r")

map_size = int(f.readline())
fill_color = f.readline()

in_coords = (f.readline()).split()
x_coord = int(in_coords[0])
y_coord = int(in_coords[1])

x_coord-=1
y_coord-=1

bitmap = []

for x in range(map_size):
    line = []
    for y in range(map_size):
        line.append(f.read(1))
    f.read(1)
    bitmap.append(line)

c = bitmap[x_coord][y_coord]

fill(bitmap, x_coord, y_coord, c, fill_color, map_size)

for x in range(map_size):
    print()
    for y in range(map_size):
        print(bitmap[x][y][0], end = '')
print() # remove to delete last \n