C12313211232233312111111312111133133313331323133323232322122222221   >>    C1231321123223331211111131211113313331333132313332323232212222222   <<    C12313211232233312111111312111133133313331323133323232322122222223   >>      C12313211232233312111111312111133133313331323133323232322122222222   >>