1. Department of Computer Applications, National Institute of Technology Kurukshetra, Kurukshetra 136119 India (e-mail: san1198@gmail.com).
2. Department of Computer Science and Informatics, School of Mathematics Computers and Information Science, Central University of Himachal Pradesh, Dharamshala 176206 India (e-mail: keshav79699@hpcu.ac.in).
3. Department of Computer Science and Informatics, School of Mathematics Computers and Information Science, Central University of Himachal Pradesh, Dharamshala 176206 India (e-mail: gs@hpcu.ac.in).