sed -i -e '/security/d' /etc/apt/sources.list
sed -i -e '/experim/d' /etc/apt/sources.list
sed -i -e '/testing/d' /etc/apt/sources.list
sed -i -e '/oldstable/d' /etc/apt/sources.list
sed -i -e '/unstable/d' /etc/apt/sources.list
apt-get update
apt-get install -y libmath-gmp-perl perl-modules-5.32 libmath-bigint-gmp-perl
#    7  perl -Mbignum=lib,GMP -e 'print 9->bnok(2),"\n"'
#    8  perl -Mbignum=lib,GMP -e 'print 3456->bnok(312),"\n"'
#    9  perl -Mbignum=lib,GMP -e 'print 3456->bnok(311),"\n"'