C3131313233313113313223313223313112113313233313223313231322123231   >>    C313131323331311331322331322331311211331323331322331323132212323   <<    C3131313233313113313223313223313112113313233313223313231322123233   >>      C3131313233313113313223313223313112113313233313223313231322123232   >>