CFD Online Discussion Forums - An error at installing OpenFoam-1.6ext

what should i do to fix the problem?

Code:

ehsan@Ehsan-com:~$ sudo apt-get install git-core flex bison rpm g++ zlib1g-dev binutils-dev libstdc‬‬++5 ‫‪libqt4-dev qt4-dev-tools libxext-dev libxt-dev libreadline-dev libncurses-dev‬‬

[sudo] password for ehsan: 

Reading package lists... Done

Building dependency tree       

Reading state information... Done

E: Unable to locate package libstdc‬‬++5

E: Couldn't find any package by regex 'libstdc‬‬++5'

E: Unable to locate package ‫‪libqt4-dev

E: Unable to locate package libncurses-dev‬‬

ehsan@Ehsan-com:~$