C11112331312111112111133131333133313231333132313331323132212131121   >>    C1111233131211111211113313133313331323133313231333132313221213112   <<    C11112331312111112111133131333133313231333132313331323132212131123   >>      C11112331312111112111133131333133313231333132313331323132212131122   >>