C12313211232233312111111312111133133313331323133323232322112131   >>    C1231321123223331211111131211113313331333132313332323232211213   <<    C12313211232233312111111312111133133313331323133323232322112133   >>      C12313211232233312111111312111133133313331323133323232322112132   >>