C111123313331323113313331333133313331323112133313331333132313233313331313233221   >>    C11112331333132311331333133313331333132311213331333133313231323331333131323322   <<    C111123313331323113313331333133313331323112133313331333132313233313331313233223   >>      C111123313331323113313331333133313331323112133313331333132313233313331313233222   >>