D11233131212331323223313133313112211232322331313132333131313231   >>    D1123313121233132322331313331311221123232233131313233313131323   <<    D11233131212331323223313133313112211232322331313132333131313233   >>      D11233131212331323223313133313112211232322331313132333131313232   >>