C111123313331323113313331333133313331323112133312111113331312321   >>    C11112331333132311331333133313331333132311213331211111333131232   <<    C111123313331323113313331333133313331323112133312111113331312323   >>      C111123313331323113313331333133313331323112133312111113331312322   >>