Q1 Strings from RES There are eight strings of length 4 which cannot be produced by the following regular expression over the alphabet Σ = {a,b}. What are they? (a + ha) * (ab 1 ha)(b + ab)*
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- I got an error message for the answer Bartleby gave me last night as follows Input Answer alphabet = "abcdefghijklmnopqrstuvwxyz"test_dups = ["zzz","dog","bookkeeper","subdermatoglyphic","subdermatoglyphics"]def histogram(s):d=dict()for c in s:if c not in d:d[c]=1 else:d[c]+=1return d;def has_duplicate(string):# return false if each letter in s is not distincth=histogram(string)for k,v in h.items():if v>1:return truereturn falsefor string in test_dups:if has_duplicate(string):printf(string,"has duplicates")else:print(string,"has no duplicates")def main():test_dups_loop()if_name=='_main_'main() THE ERROR MESSAGE said ***TRUE NEEDS TO BE DEFINED. this is all I need from the answer code I received.A finite sequence of symbols from a given alphabet will be called a string over the alphabet. A string that consists of a sequence a1, a2, a3, a4, … … … … , ?? of symbols will be denoted by the juxtaposition a1 a2 a3 a4 … … … … ??. Given the strings: ? = a2bab2and v = bab2, Evaluate the following operations for strings: (i) ԑu(ii) u + v(iii) u(u| v)(iv) v | (v | u)Two words are anagrams if they contain all of the same letters, but in a different order. For example, “evil” and “live” are anagrams because each containsone ‘e’, one ‘i’, one ‘l’, and one ‘v’. Create a program in python that reads two strings from the user, determines whether or not they are anagrams.
- Read the input one line at a time and output the current line if and only if it is largerthan any other line read so far or strictly smaller than the previously outputted line. (Here,smaller is with respect to the usual order on Strings, as defined by String.compareTo()). you have to use arrylist and cant modify any code under public static void main(string[] args). example: input 138456792 output: 138492 import java.util.*; import java.io.BufferedReader; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.util.Stack; public class Part2 { /** * Your code goes here - see Part0 for an example * @param r the reader to read from * @param w the writer to write to * @throws IOException */ public static void doIt(BufferedReader r, PrintWriter w) throws IOException { /*ArrayList<String> arr = new ArrayList<>(); int count…write a program that allows the input of a string from the user and prints the longest word in that string and its length. If there are multiple words with the same maximum length you must print the first one only.What strings are generated by the following regular expressions, defined over the alphabet Σ = {a, b, c}(a + b)∗c(aa+)(bb∗)(aa+) + (bb∗)a∗b∗c∗
- Write a program that takes a string as input and outputs the string in all capital letters and the length of the string. The output should follow the format from the example below. Example:Enter a DNA strand: aAtcDNA strand: AATCLength: 4Tip: make use of the .upper() method, the len() function, and the ‘\t’ escape character to add tabs.Write a program that generates 1,000 lowercase letters randomly, counts the occurrence of each letter, and displays a histogram for the occurrences, as shown in Figure 10.16a.1. a Write a regular expression for the set of binary strings where each string has at least one pair of consecutive zeros. b. write the regular expression for the following, where sigma = (a,b): i. string of length at least 2 ii. string of length at most 2 iii. all string starting with a and ending with b iv. Even length Strings
- if strings are immutable, like in Java, we can assume that they have a static length True FalseGiven a non-empty string check if it can be constructed by taking a substring of it and appending multiple copies of the substring together. For example: Input: "abab" Output: True Explanation: It's the substring "ab" twice. Input: "aba" Output: False Input: "abcabcabcabc" Output: True Explanation: It's the substring "abc" four times. Reference: https://leetcode.com/problems/repeated-substring-pattern/description/ """ def repeat_substring(s): """ :type s: str.Use Java Programming; You are tasked to make a program that accepts a string. From that string, print out the number of permutations and all the permutations of that string including itself. Expected output: String: abc All permutations of abc: 6 abc acb bac bca cab cba