C12313211232233312111111312111133133313331323133323232322122113123311   >>    C1231321123223331211111131211113313331333132313332323232212211312331   <<    C12313211232233312111111312111133133313331323133323232322122113123313   >>      C12313211232233312111111312111133133313331323133323232322122113123312   >>