C111123313331323113313331333133313331323132333133313331322132212111   >>    C11112331333132311331333133313331333132313233313331333132213221211   <<    C111123313331323113313331333133313331323132333133313331322132212113   >>      C111123313331323113313331333133313331323132333133313331322132212112   >>