영어 서수 (Ordinal Numbers) 1-100first second third fourth fifth sixth seventh eighth ninth tentheleventh twelfth thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenthtwentieth twenty-first twenty-second twenty-third twenty-fourth twenty-fifth twenty-sixth twenty-seventh twenty-eighth twenty-ninththirtieth thirty-first thirty-second thirty-third thirty-fourth thirty-fifth thirt..
