Doubt in--Shil and Palindrome Research

I’m passing 4 out of 5 test cases nd getting no-output in one test case.I’m not able to get why am i not getting any output for this particular test-case.Pls pin-point if there is some corner test cse.
Link to my code is----https://ide.codingblocks.com/s/105762

because there input file for that test case is empty… again same thing error in test case… hopefully they will fix it soon