Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\xx>cd desktop
C:\Users\xx\Desktop>at.pl

 A=1 ends at 2

 A=2 ends at 5

 A=3 ends at 8

 A=4 ends at 13

 T=1 ends at 3

 T=2 ends at 6

 T=3 ends at 9

 T=4 ends at 14

Use of uninitialized value in print at C:\Users\DR-SUPRIYO\Desktop\at.pl line 13.
Use of uninitialized value in print at C:\Users\DR-SUPRIYO\Desktop\at.pl line 13.