How can I solve the problem below?
$ sudo apt-get install gtypist
sudo: unable to resolve host vanz
Reading package lists... Error!
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/ppa.launchpad.net_noobslab_malys-themes_ubuntu_dists_xenial_main_binary-amd64_Packages
E: The package lists or status file could not be parsed or opened.