WHY

dir 'HKLM:\SOFTWARE\Microsoft\Office\*\Common\InstallRoot' | %{ ($_.Name -Split '\\')[-3];(gp $_.PSPath).'Path' }
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WHY

@echo off
set "key=HKLM\SOFTWARE\Microsoft\Office"
for /f "delims=" %%i in ('reg query "%key%" ^| findstr "^HKEY_.*\\[0-9][0-9.]*$"') do (
    echo;%%~nxi
    for /f "tokens=1,2*" %%i in ('reg query "%%i\Common\InstallRoot"') do if "%%i" == "Path" echo;%%k
)
pause
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