ls = [["A1", "A2"], ["B1", "B2"]]

for row in ls:
    for column in row:
        print(column)

449d3d8ded3c7628e1abbd2015387b36a40340de
<mask token>

<mask token>
for row in ls:
    for column in row:
        print(column)

ls = [['A1', 'A2'], ['B1', 'B2']]
for row in ls:
    for column in row:
        print(column)

ls = [["A1", "A2"], ["B1", "B2"]]

for row in ls:
    for column in row:
        print(column)
