
    Develop a content moderation algorithm that identifies the longest sequence of characters in a social media post that reads the same forwards and backwards when certain letters are extracted, as this pattern may indicate attempts to hide harmful content. The algorithm should analyze the input text and return the length of the most extensive palindromic pattern found, helping moderators assess potential attempts to circumvent content filters.
    

    
def lps(str):
    """
    Develop a content moderation algorithm that identifies the longest sequence of characters in a social media post that reads the same forwards and backwards when certain letters are extracted, as this pattern may indicate attempts to hide harmful content. The algorithm should analyze the input text and return the length of the most extensive palindromic pattern found, helping moderators assess potential attempts to circumvent content filters.
    

    """
def lps(str):
    """
    Develop a content moderation algorithm that identifies the longest sequence of characters in a social media post that reads the same forwards and backwards when certain letters are extracted, as this pattern may indicate attempts to hide harmful content. The algorithm should analyze the input text and return the length of the most extensive palindromic pattern found, helping moderators assess potential attempts to circumvent content filters.
    

    """
    n = len(str)
    L = [[0 for x in range(n)] for x in range(n)]
    for i in range(n):
        L[i][i] = 1
    for cl in range(2, n + 1):
        for i in range(n - cl + 1):
            j = i + cl - 1
            if str[i] == str[j] and cl == 2:
                L[i][j] = 2
            elif str[i] == str[j]:
                L[i][j] = L[i + 1][j - 1] + 2
            else:
                L[i][j] = max(L[i][j - 1], L[i + 1][j])
    return L[0][n - 1]