Randomized Cycle II Examine together with Cetuximab together with 5-FU as well as Abemaciclib or even Carboplatin compared to Cetuximab along with Paclitaxel as well as Carboplatin to treat Individuals together with Relapsed or Metastatic Squamous Mobile or portable Carcinoma of the Head and Neck (CETMET Demo) | #abemaciclib #vemurafenib #carmofur