C11112331312111112111133131333133313231333132313331323132212131   >>    C1111233131211111211113313133313331323133313231333132313221213   <<    C11112331312111112111133131333133313231333132313331323132212133   >>      C11112331312111112111133131333133313231333132313331323132212132   >>