C11111333133313232233133313331333133313231312111113113313232212112121   >>    C1111133313331323223313331333133313331323131211111311331323221211212   <<    C11111333133313232233133313331333133313231312111113113313232212112123   >>      C11111333133313232233133313331333133313231312111113113313232212112122   >>