Day 13 Roll Your Matrices

''' Read input from STDIN. Print your output to STDOUT '''
    #Use input() to read input from STDIN and use print to write your output to STDOUT

def main():
    row, col = map(int,input().split())
    arr=[]
    for i in range(row):
        arr.append(list(map(int, input().split())))
    arr3 = []
    
    for i in range(col):
        new = []
        for j in range(row):
            new.append(arr[j][i])
        arr3.append(new)
   
    t = len(arr3)
    for i in range(t):
        for j in range(t):
            if arr3[i][j]!=arr3[i][t-1]:
                print(arr3[i][j],end=' ')
            elif i+j==2*i:
                print(arr3[i][j],end='')
            else:
                print(arr3[i][j])
main()