C111123313331323113313331333133313331323132333133313211232212112111   >>    C11112331333132311331333133313331333132313233313331321123221211211   <<    C111123313331323113313331333133313331323132333133313211232212112113   >>      C111123313331323113313331333133313331323132333133313211232212112112   >>