The problem here is to use Python to count the number of unique words in the following string: gba = Hour score and seven years ago our fathers brought forth on this continent a new nation, conceived in Liberty, and dedicated to the\\ proposition that all men are created equal. Now we are engaged in a "civil war, testing whether that nation or any nation so conceived and so dedicated, can long endure. We are met on a\\ great battlefield of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this. But, in a larger sense, we can not dedicate, we can not consecrate, we can not hallow, this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here. It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for \\ us to be here dedicated to the great task remaining before us, that from these honored dead we take increased devotion to that cause for which \\ they gave the last full measure of devotion, that we here highly resolve \\ that these dead shall not have died in vain -- that this nation, under God, \\ shall have a new birth of freedom -- and that government of the people, by the people, for the people, shall not perish from the earth. ' To get an accurate count, this it will be necessary to remove all punctuation from the string and set all characters in the string either to lower case or upper case, so that you can compare them. You can use the following function to remove the punctuation: def remove_punctuation(s) punc = For c in 5: s. replace (c. "") if c in pune else s Your program will provide two outputs: The total number of words . The total number of unique words The Lotal number of words is 273, and the total unique words is 139, Your program's calculation should match those numbers Some built in methods and functions you might find useful include split list. set lower. append. print, and len