spiral_matrix

def is_matrix(some_matrix):
    if len(some_matrix) == 0:
        return True
    return False


row = int(input())
col = int(input())

matrix = []

for k in range(row):
    matrix.append(input().split())

spiral_list = []
while matrix:
    current_row = matrix[0]
    for i in current_row:
        spiral_list.append(i)
    matrix.pop(0)

    if is_matrix(matrix):
        break

    for j in matrix:
        last_element = j[-1]
        spiral_list.append(last_element)
        j.pop()
    if is_matrix(matrix):
        break

    next_row = matrix[-1]
    next_row.reverse()
    for x in next_row:
        spiral_list.append(x)
    matrix.pop(-1)
    if is_matrix(matrix):
        break

    first_element_list = []
    for y in matrix:
        first_element = y[0]
        first_element_list.append(first_element)
        y.pop(0)
    first_element_list.reverse()
    spiral_list.extend(first_element_list)
    if is_matrix(matrix):
        break

print(f"{' '.join(spiral_list)}")