C11111333133313232233133313331333133313231333133313113313332232111113231311211   >>    C1111133313331323223313331333133313331323133313331311331333223211111323131121   <<    C11111333133313232233133313331333133313231333133313113313332232111113231311213   >>      C11111333133313232233133313331333133313231333133313113313332232111113231311212   >>