2
11 22
33 44

b = int(input())
a = []
for num in range(b):
    a.append([])
    i = input().split()
    for r in range(len(i)):
        a[num].append(i[r])
print(a)

2 # 1 тест
11 22
33 44

2 # 2 тест
11 22 33
44 55 66

[['11', '22'], ['33', '44']] # 1 тест
[['11', '22', '33'], ['44', '55', '66']] # 2 тест

In [3]: [input().split() for _ in range(int(input()))]
2
1 2
3 4
Out[3]: [['1', '2'], ['3', '4']]

s0 = '''2
11 22
33 44'''
(n, s1) = s0.split('n', 1)
li = map(str.split, s1.split('n', int(n)))
print(list(li))  # [['11', '22'], ['33', '44']]