C111123313331323113313331333133313331323132333132333132313231232211   >>    C11112331333132311331333133313331333132313233313233313231323123221   <<    C111123313331323113313331333133313331323132333132333132313231232213   >>      C111123313331323113313331333133313331323132333132333132313231232212   >>