A string w of a's and b's is valid if it satisfies one of the following conditions: • w is the empty string • w = aub for some valid string u • w = uv for some valid strings u and v For example, the string w = aaabbabbaabbab is valid, because w = uv, where u = aaabbabb and v = aabbab. Describe an efficient algorithm to determine whether a given string of a's and b's is valid. Analyze its time and space requirements. (Aim for solving the problem in linear time.) Show how the algorithm works on the above example.

Given a string, check whether it is a panagram or not.A panagram is a sentence that uses every letter at least once.The most famous example is: "he quick brown fox jumps over the lazy dog.Note:A panagram in one language isn't necessarily a panagram in another. Thismodule assumes the english language. Hence, the Finnish panagram'Törkylempijävongahdus' won't pass for a panagram despite being considereda perfect panagram in its language. However, the Swedish panagram'Yxmördaren Julia Blomqvist på fäktning i Schweiz' will pass despiteincluding letters not used in the english alphabet. This is because theSwedish alphabet only extends the Latin one.""" from string import ascii_lowercase def panagram(string):    """    Returns whether the input string is an English panagram or not.        Parameters:            string (str): A sentence in the form of a string.        Returns:.

TRUE OR FALSE Finding a matching string can be effectively solved using a divide-and-conquer algorithm.

Given a string, check whether it is a panagram or not.A panagram is a sentence that uses every letter at least once.The most famous example is: "he quick brown fox jumps over the lazy dog.Note:A panagram in one language isn't necessarily a panagram in another. Thismodule assumes the english language. Hence, the Finnish panagram'Törkylempijävongahdus' won't pass for a panagram despite being considereda perfect panagram in its language. However, the Swedish panagram'Yxmördaren Julia Blomqvist på fäktning i Schweiz' will pass despiteincluding letters not used in the english alphabet. This is because theSwedish alphabet only extends the Latin one.""" from string import ascii_lowercase def panagram(string):    """    Returns whether the input string is an English panagram or not.        Parameters:            string (str): A sentence in the form of a string.        Returns:.