import sys
from itertools import takewhile
def read_matrix():
return [[int(x) for x in line.split()] for line in takewhile(lambda line: line.strip(), sys.stdin)]
a = read_matrix()
print(a)
b = read_matrix()
print(b)
aW1wb3J0IHN5cwpmcm9tIGl0ZXJ0b29scyBpbXBvcnQgdGFrZXdoaWxlCgoKZGVmIHJlYWRfbWF0cml4KCk6CiAgICByZXR1cm4gW1tpbnQoeCkgZm9yIHggaW4gbGluZS5zcGxpdCgpXSBmb3IgbGluZSBpbiB0YWtld2hpbGUobGFtYmRhIGxpbmU6IGxpbmUuc3RyaXAoKSwgc3lzLnN0ZGluKV0KCgphID0gcmVhZF9tYXRyaXgoKQpwcmludChhKQoKYiA9IHJlYWRfbWF0cml4KCkKcHJpbnQoYik=
[[1, 2, 3], [4, 5, 6]]
[[7, 8], [9, 0], [1, 2]]