Replace Text in a Text Field

I have a text field that has to to have part of it changed. I do not need all of the text changed in the string just part of it. Its a sequence number so I have tried a lotus script but its meant for a rich text field.

Example Cr/CROS-0001

Need to be: CR/CROS-0001

I just need to change the case on the one character. Any help would be great.

Subject: FIELD YourField := @UpperCase(YourField);

Subject: Replace Text in a Text Field…example

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