C111123313331323113313331333133313331323131211113313331313233221   >>    C11112331333132311331333133313331333132313121111331333131323322   <<    C111123313331323113313331333133313331323131211113313331313233223   >>      C111123313331323113313331333133313331323131211113313331313233222   >>