Task: Question Answering
Input (English): Problem: in the land of oz only one or two - letter words are used . the local language has 69 different letters . the parliament decided to forbid the use of the seventh letter . how many words have the people of oz lost because of the prohibition ? 
Options: a ) 65 , b ) 66 , c ) 67 , d ) 131 , e ) 138
Output (English): e