C11111333133313232233133313331333133313231312111113113313232213112121   >>    C1111133313331323223313331333133313331323131211111311331323221311212   <<    C11111333133313232233133313331333133313231312111113113313232213112123   >>      C11111333133313232233133313331333133313231312111113113313232213112122   >>