C11112331312111112111133132313331333133313232212111133133112131121   >>    C1111233131211111211113313231333133313331323221211113313311213112   <<    C11112331312111112111133132313331333133313232212111133133112131123   >>      C11112331312111112111133132313331333133313232212111133133112131122   >>