regexMatcher question

pls give me a little help. I cannot match a (fake) string like this: RSSMRA30A01H501I with a regular expression in a String Manipulation Node. I tried regexMatcher($fiscal_code$,"[A-Z]{6}\d\d[A-Z]\d\d[A-Z]\d\d\d[A-Z]") w/o success.
Where am I wrong? Thanks!

Your regular expression works. But the String Manipulation Node needs two backslashes as an escape sequence. Try to use regexMatcher($fiscal_code$,"[A-Z]{6}\\d\\d[A-Z]\\d\\d[A-Z]\\d\\d\\d[A-Z]")

Thank you, MH!