C11112331312111112111133133313331333133322131131211331333132212231   >>    C1111233131211111211113313331333133313332213113121133133313221223   <<    C11112331312111112111133133313331333133322131131211331333132212233   >>      C11112331312111112111133133313331333133322131131211331333132212232   >>