Task: Pos Tagging
Input (English): Sentence: So , for happy years , Helva scooted around in her shell with her classmates , playing such games as Stall , Power-Seek , studying her lessons in trajectory , propulsion techniques , computation , logistics , mental hygiene , basic alien psychology , philology , space history , law , traffic , codes : all the {{ et }} ceteras that eventually became compounded into a reasoning , logical , informed citizen . 
Word: et
Output (English): X