Module:Sandbox/Zyxw/test

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local p = {}

function p.main(frame)

    local inputString = frame.args[1]

    if inputString == '' then
        return inputString
    end
        
    if not inputString:match('^%d{4} *%a{3,9} *%d{1,2}$') then
        return inputString
    end

    local value1, value2, value3 = string.match(inputString, "^(%d{4}) *(%a{3,9}) *(%d{1,2})$")
    return value3 .. ' ' .. value2 .. ' ' .. value1

end

return p