FixValues when input value is not mapped

Hi experts,

I have a maybe simple but urgent question.

I have a field with fixValues:

input output

d1--> cr1

d2 -->cr2

when input is d1 or d2 it's all ok.

When input is another value the output is blank, but in this case I need that output value is equal to input value.

Is possile?

thanks

Fabio