N = int(input())
M = int(input())

mat = [[int(i) for i in input().split()] for _ in range(N)]

m = int(input())
t = int(input())
 
for i in range(N):
   mat[i][m],mat[i][t] = mat[i][t],mat[i][m]
    
for row in mat:
    print(*row)
   

  
>>> def f():
...     N = int(input('Enter the number of rows: '))
...     M = int(input('Enter the number of columns: '))
...     
...     mat = [[int(i) for i in input('Enter a row: ').split()] for _ in range(N)]
...     
...     m = int(input('Enter the first column number: '))
...     t = int(input('Enter the second column number: '))
...     
...     for i in range(N):
...        mat[i][m],mat[i][t] = mat[i][t],mat[i][m]
...     
...     for row in mat:
...         print(*row)
... 
>>> f()
Enter the number of rows: 3
Enter the number of columns: 4
Enter a row: 1 2 3 4
Enter a row: 5 6 7 8
Enter a row: 4 3 2 1
Enter the first column number: 0
Enter the second column number: 3
4 2 3 1
8 6 7 5
1 3 2 4
>>>