C11111211113313112113313331333133313331333131211113313331333132112323221121   >>    C1111121111331311211331333133313331333133313121111331333133313211232322112   <<    C11111211113313112113313331333133313331333131211113313331333132112323221123   >>      C11111211113313112113313331333133313331333131211113313331333132112323221122   >>