he following codetext was encrypted by a Vigenere cipher. You have to determine the

keyword. The "correct" answer should consist of the keyword $+$ your work to show how this

was obtained. I assume you will use some code and possibly some $$obvious observations$.$

Part of the assignment is to convince a third party $($here the grader$)$ that you have actually

cracked the code. Thus you should include all supporting evidence.

alpthvwxlweuvvxhvjdtjvpidvtiprrglufxyioapxealqzglxsputpchroehtpga

lpbhmyrsedhpglajmawlvenwidpyieghrdevwtipsyrptstywhwpgsglecghrrtal

pdyhpgvjwtaxpgzmyptidhhkppuhdjiwexayexvrnxwlpgzasxjldnzxpbhxtrhpw

nyiaahgpalxetywzgnvzjwwzusieilvdlpxsdalpgsieilvddykcdbtddmppiaich

icctwplrprrthgsalxetyatioxstvrpuvpwddmyvpxtcalppstspiiehpqaalzpgz

mzczsqtpxstysqulvpssmeisindujtslrexhptifeyszxtashzcvxlclecafwfqzx

tibxtdugteoiclhwewlgltzecrptstymylomnwlenwsieilvtcalpesetcaiiided

gltwpjioqfewtaxpgzsxtmmitkrfbiicdmtzhpxtduwqjyxstyhzluxsthpawhfpi

pxhpzrlblhluaicybptjzgltzeclosthyiadyxpsasspcifhlhtidmewhwsxmxzua

lctlxzrvqxjumnpaihxalsxzkpclvlazhfgprrwpwxxsmepycnpttlxnrd

$[$End of line characters have been inserted only for printing purposes.$]$

The following table should be helpful.

Shift amount $1234567891011121314151617181920$

Number of coincidences $2344414731333457303440483834335329362955$