
    Design a content analysis function 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 could indicate coded messaging or coordinated harmful communication. The function should examine the entire post content and return the length of the most extensive palindromic pattern found, helping moderators assess the sophistication of potential policy-violating content.
    

    
def lps(str):
    """
    Design a content analysis function 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 could indicate coded messaging or coordinated harmful communication. The function should examine the entire post content and return the length of the most extensive palindromic pattern found, helping moderators assess the sophistication of potential policy-violating content.
    

    """
def lps(str):
    """
    Design a content analysis function 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 could indicate coded messaging or coordinated harmful communication. The function should examine the entire post content and return the length of the most extensive palindromic pattern found, helping moderators assess the sophistication of potential policy-violating content.
    

    """
    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]