# your code goes here
arr = [[1,2,3,4], [5,6,7,8]]
print(arr)
print(arr[0])
print(arr[0][2])
print(' ')
for i in range(len(arr)):
for j in range(len(arr[i])):
print(arr[i][j])
IyB5b3VyIGNvZGUgZ29lcyBoZXJlCgphcnIgPSBbWzEsMiwzLDRdLCBbNSw2LDcsOF1dCgpwcmludChhcnIpCnByaW50KGFyclswXSkKcHJpbnQoYXJyWzBdWzJdKQpwcmludCgnICcpCgpmb3IgaSBpbiByYW5nZShsZW4oYXJyKSk6Cglmb3IgaiBpbiByYW5nZShsZW4oYXJyW2ldKSk6CgkJcHJpbnQoYXJyW2ldW2pdKQ==
[[1, 2, 3, 4], [5, 6, 7, 8]]
[1, 2, 3, 4]
3
1
2
3
4
5
6
7
8