C11111211113313112113313331333133313231311331333132221233132313232222331   >>    C1111121111331311211331333133313331323131133133313222123313231323222233   <<    C11111211113313112113313331333133313231311331333132221233132313232222333   >>      C11111211113313112113313331333133313231311331333132221233132313232222332   >>