lcs.py

# two strings
A = 'abcabba'
B = 'cbabac'

# Get a list of columns and their truth values.
[[a == b for (a, b) in list(it.product(A, B))][i*6:i*6+6] for i in range(len("abcabba"))]

"""
expected_result = [[False, False, True, False, True, False],
 [False, True, False, True, False, False],
 [True, False, False, False, False, True],
 [False, False, True, False, True, False],
 [False, True, False, True, False, False],
 [False, True, False, True, False, False],
 [False, False, True, False, True, False]]
"""