C1111233131211111211113313331333133313232212111133123313231311331   >>    C111123313121111121111331333133313331323221211113312331323131133   <<    C1111233131211111211113313331333133313232212111133123313231311333   >>      C1111233131211111211113313331333133313232212111133123313231311332   >>