King of SR - Tamil Nadu Superfast
King of ER- ??
King of WR - ??
King of NR - ??
King of SER - Coro
King...
more... of SWR - ??
King of NER - ??
King of NWR - ??
King of NFR - ??
King of SECR - ??
King of KR - ??
King of CR - ??
King of ECR - ??
King of WCR - ??
King of E Co R - ??
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Do list out if anything is missed out..!