甲乙

jiǎ yǐ

first two of the ten Heavenly Stems 十天干[shi2 tian1 gan1]

甲

jiǎ

first of the ten Heavenly Stems 十天干[shi2 tian1 gan1]

乙

yǐ

second of the ten Heavenly Stems 十天干[shi2 tian1 gan1]