C11111211113313112113313331333133313113121111331333132233132313111   >>    C1111121111331311211331333133313331311312111133133313223313231311   <<    C11111211113313112113313331333133313113121111331333132233132313113   >>      C11111211113313112113313331333133313113121111331333132233132313112   >>