Enumerations

I am trying to validate enumerations but getting an error(null value) though I have created a map 'kind'. How to resolve

//reading the values from a response which has the output like 1,2,3
def Brep=slurpB.Message.ReturnRows.e.DocPrintBypassPrintSwitch.text()

//created a map for enumeartions

def kind=[ '1' : 'FormatReports', '2':'AllReports', '3': 'Error']

//logging the enumerated value
Brept=kind.Brep
log.info Brept

Output :Null

Expected : enumerated values

What should be done to get the enumerated value