+1 = 5 

ˋ

  1. 天干

  2. 等級次第」。

fifth of the ten Heavenly Stems 十天干[shi2 tian1 gan1], fifth in order, letter "E" or roman "V" in list "A, B, C", or "I, II, III" etc, penta
car. cycl.
der fünfte der zehn "Himmelsstämme" des chinesischen Kalenders (S)​, Pentyl, Pentylgruppe (S, Chem)​