C111112111133131121133133313331323133313221131211331323133313232212131   >>    C11111211113313112113313331333132313331322113121133132313331323221213   <<    C111112111133131121133133313331323133313221131211331323133313232212133   >>      C111112111133131121133133313331323133313221131211331323133313232212132   >>