Proposed coach composition can be:
L-SLR-GEN-GEN-GEN-D1-D2-S1-S2-S3-A1-A2-B1-B2-GEN-SLR. The current coach composition is looking somewhat strange, for there is only one sleeper class, that too at the front end. So, if the coach composition given in this writing is realised, it will be better for the passengers who have to travel such a long distance in about 20 hrs.