merry christmas and happy new year还是 merry chistmas and a happy new year 还是说两个都对?如题

Merry Christmas and happy New Year! Merry Christmas and a happy newyear Merry Christmas and best wishes for happynew Merry christmas and best wishes to you Merry Christmas and a happy newye Merry Christmas Merry Christmas merry christmas Merry Christmas! MERRY CHRISTMAS Merry Christmas! merry christmas! Merry christmas! merry christmas! Merry Christmas! merry christmas, merry christmas Merry Christmas和Merry Christmas day区别?