+6 = 12

ㄊㄨㄥˇtǒng

ㄊㄨㄥˇtǒng
  1. 筆筒」、煙筒」、火箭筒」。
tube, cylinder, to encase in sth cylindrical (such as hands in sleeves etc)​
Röhre (S)​, Zylinder (S, Math)​