_____________              _____________              _____________
|             |            |             |            |             |
|     385     |    ....    |     764     |    --->    |     435     |
|_____________|            |_____________|            |_____________|

                             [S[_]m_n(nn)             " s__d]
                            [S_m_n(dd) [s_            _d ]"]