Determine the plaintext associated with this Vigen$$re encrypted ciphertext by applying Friedman$$s Attack. Please show your work, providing your own intermediate calculations or your own code.

You may find Example $2\mathrm{.}12($pg $46-48)$ helpful. Stinson$-$Paterson use subscript notation, fi$,$ in their formulas. You may find it more convenient to use array notation, f $[$i$].$ In this case, f$[$i$],0<=$ i $<=25,$ represents the count of the number of the i$-$th characters in the given substring. So f $[0]=$ the number of As$,$ f $[1]=$ the number of Bs$,$ f $[25]=$ the number of Zs$.$ In particular, we can rewrite fi $+$ g as f $[$i $+$ g$]$ where i $+$ g is calculated mod $26.$

Please see the supplied spreadsheet for sample calculations of Mg for the first substring from Example $2\mathrm{.}12$

GLZAFSKBWPOBHTTQHDKFSQQZGAXDFNPVYPOVBUHKKXHBVBWQLATNCIXJXOOQXUXP

VDZYIWHDLAXDWMZZMJHGXDSNZCTUHPVDRTEUVZOLRKANGLCROKNLXDSXFHCCCMHD

LAFDUBXPVZMPWDCVRVYHSZKUCKIONAWKATVOIBTNKAMJHNFHOEBFLVQAHGBUKNWF

AAMBWSBZJKFXHBVOSKYOENRCBZOOVZOLHEGZIWSEBSXKQAANKLXDOMFVWPHDVORK

ZNZPIORNGAAKFQRALWHXHBGWBSLLIIHNVVQAIOPPXDGTKLFEZKBVRZCKEHVSWMGL

VOOSYPVOHINZXZCOKVNAQSLMSNMNNYWAZEYVVBIMRVYHZFXAFAHSXYEJRAXAXAFZ

EVXKTGTJOEBFBZTHOXBUKSWSAVXDSQILSLZDRVYGBNPNIPHHGNXDSLMVHKGSKHRC

SSAPRCG