Any given input of a lowercase string a1a2a3 ... an-1an (n ≥ 5) Output: the string Ana1An-1a2An-2a3 A2an-1A1an, which Ai ai uppercase for example, input aybdx recursive program output XaDyBbYdAx

9\9\9.cpp
.\.\9.vcproj
.\.\9.vcproj.tianning-PC.tianning.user
.\.\Debug\9.exe.embed.manifest
.\.\.....\9.exe.embed.manifest.res
.\.\.....\9.exe.intermediate.manifest
.\.\.....\9.obj
.\.\.....\BuildLog.htm
.\.\.....\mt.dep
.\.\.....\vc80.idb
.\.\.....\vc80.pdb
.\9.ncb
.\9.sln
.\9.suo
.\debug\9.exe
.\.....\9.ilk
.\.....\9.pdb
.\9\Debug
.\9
.\debug
9

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