That way , the letter ' is 1 , ' is 2 , ' is 3 , and so on until ' = 10 , ' = 20 , ' = 30 , â , ' = 200 , â , ' = 1000 . is 1 , ' is 2 , ' is 3 , and so on until ' = 10 , ' = 20 , ' = 30 , â , ' = 200 , â , ' = 1000 .