def _len_lcs(x, y):
    'Returns the length of the Longest Common Subsequence between two seqs.\n\n  Source: http://www.algorithmist.com/index.php/Longest_Common_Subsequence\n\n  Args:\n    x: sequence of words\n    y: sequence of words\n\n  Returns\n    integer: Length of LCS between x and y\n  '
    table = _lcs(x, y)
    (n, m) = (len(x), len(y))
    return table[(n, m)]
Returns the length of the Longest Common Subsequence between two seqs.

Source: http://www.algorithmist.com/index.php/Longest_Common_Subsequence

Args:
  x: sequence of words
  y: sequence of words

Returns
  integer: Length of LCS between x and y
def _len_lcs(x, y):
    'Returns the length of the Longest Common Subsequence between two seqs.\n\n  Source: http://www.algorithmist.com/index.php/Longest_Common_Subsequence\n\n  Args:\n    x: sequence of words\n    y: sequence of words\n\n  Returns\n    integer: Length of LCS between x and y\n  '
    table = _lcs(x, y)
    (n, m) = (len(x), len(y))
    return table[(n, m)]