C11112331312111112111133132313331333133313232212111113231333132322221   >>    C1111233131211111211113313231333133313331323221211111323133313232222   <<    C11112331312111112111133132313331333133313232212111113231333132322223   >>      C11112331312111112111133132313331333133313232212111113231333132322222   >>