C11112331312111112111133132313331333133313232212111111213223311   >>    C1111233131211111211113313231333133313331323221211111121322331   <<    C11112331312111112111133132313331333133313232212111111213223313   >>      C11112331312111112111133132313331333133313232212111111213223312   >>