6. (20 points) Suppose the following ciphertext was encrypted using Vigenre cipher with key size equal to 2. Try to find the two letters that were used in the encryption. fwrsgpwivjtolihwadifmdeoexwtmfmduubke sbgaauvvmadagtpeautopzbwqcmqtjd buxbabuxnonnfarqptjlqgxnabhkahqfgkvmylenkynzebuxwddrgpuzrlkfbbfoaelx navqbpsarjqetgaaalixjtcexoonunyktruarzlyenvgaaligmarwsmanknehelgaagz rtpaurkeciagkvmymsaqapwsarkrelngwpxexjtqpxohqcpetpninivgxnavqmdevjhn kmqtoabliasmgmarprkafmekadphfkrwhlhybbaestnvgonfnycmflwtuvgenoubohcz hnocflpozlmdekreabznmadrhflivtynoobyyatnoarifvkuvgrxaarwknifmkrggawt praaazqtpavtxhspbmalqatjgmylyaucvwlqshnnqnmde auhntaghnyjehqgpgbjtmeg wtqbgwligmanbvhjavqpwsmixjtzngoligxzivghbrmavdhqfpetiawoabvkaivckksm ngzivfiaekuxwrvrwlrivlafzbfyrqgbysiawlemelwnluxsaanynimawpoxexoilrgp siemesbfbjdcfmniiybotangzecehleiakkyiymu 6. (20 points) Suppose the following ciphertext was encrypted using Vigenre cipher with key size equal to 2. Try to find the two letters that were used in the encryption. fwrsgpwivjtolihwadifmdeoexwtmfmduubke sbgaauvvmadagtpeautopzbwqcmqtjd buxbabuxnonnfarqptjlqgxnabhkahqfgkvmylenkynzebuxwddrgpuzrlkfbbfoaelx navqbpsarjqetgaaalixjtcexoonunyktruarzlyenvgaaligmarwsmanknehelgaagz rtpaurkeciagkvmymsaqapwsarkrelngwpxexjtqpxohqcpetpninivgxnavqmdevjhn kmqtoabliasmgmarprkafmekadphfkrwhlhybbaestnvgonfnycmflwtuvgenoubohcz hnocflpozlmdekreabznmadrhflivtynoobyyatnoarifvkuvgrxaarwknifmkrggawt praaazqtpavtxhspbmalqatjgmylyaucvwlqshnnqnmde auhntaghnyjehqgpgbjtmeg wtqbgwligmanbvhjavqpwsmixjtzngoligxzivghbrmavdhqfpetiawoabvkaivckksm ngzivfiaekuxwrvrwlrivlafzbfyrqgbysiawlemelwnluxsaanynimawpoxexoilrgp siemesbfbjdcfmniiybotangzecehleiakkyiymu