C111123313331323113313331333133313331323132333112323133313233221   >>    C11112331333132311331333133313331333132313233311232313331323322   <<    C111123313331323113313331333133313331323132333112323133313233223   >>      C111123313331323113313331333133313331323132333112323133313233222   >>