C11112331312111112111133132313331333133313232212111112312323231   >>    C1111233131211111211113313231333133313331323221211111231232323   <<    C11112331312111112111133132313331333133313232212111112312323233   >>      C11112331312111112111133132313331333133313232212111112312323232   >>