CM Parse rule derive from additional information [LITERAL](<[MATCHING TOKEN],[START-END]>)[LITERAL]

By using the parse rule we need to derive the value 'CITIN25500664167' from the below statement line:

:86:829?00EFT INCOMING?20/EI/NEFT IN UTR CITIN25500664167 FROM BR
OADRIDGE FINANCIAL SOLU B?21NP AH25002NAAX04TXN REF NO PREF195875
PREF195875

We have used the below in the parse rule one by one as testing combinations:[LITERAL](<[MATCHING TOKEN],[START-END]>)[LITERAL]

:86:856?00INCOMING RTGS TRANSFER?20/PY/UTR/(1-22)~ 

:86:856?00INCOMING RTGS TRANSFER?20/PY/UTR /(1-22)~ 

856?00INCOMING RTGS TRANSFER?20/PY/UTR /(1-22)~ 

 856?00INCOMING RTGS TRANSFER?20/PY/UTR /(1-22)?21/BN/

 856?00INCOMING RTGS TRANSFER?20/PY/UTR /(1-22)?21/BN/

 INCOMING RTGS TRANSFER?20/PY/UTR/ (1-22)?21/BN/

But it is not working, what is wrong in these or what should we use to extract the number beside the UTR?