Short Answer:
Cylinder re spin chyyaathe shoot chyyunnath aane nallath
Detailed Explanation:
Total 6 chambers. Athil 4 empty.(These 4 are adjacent as well) Athil onnaane ippol fire chythath.
So remaining empty chambers= 3
Ithil next shot fire aavanamenkil aadyathe shot 4th empty chamber aayal maatrm aayirikkum. (Since bullets are in adjacent chambers) Baakki 3 empty slot aanenkilum nammal rekshapedum.
So chances of surviving the next shot is 3/4 here.
If he re spin the chamber and shoot again chances of surviving becomes normal 4/6 which is lesser than the first situation.