VIA Secunderabad- Vijayawada- Visakhapatnam- Bhubaneswar- Kharagpur- Kolkata Santragachi [REACH HOWRAH from HERE which is just 7 KM AWAY] - Howrah- Barddhaman - Rampurhat- Malda- KISHANGANJ- Kamakhya- Guwahati.
18560/Σ Hyderabad- KishanGanj- Guwahati (Reach Howrah from Santragachi which is JUST 7 KM) ΣChain