input: [0] to sum up [2] hence [3] so [4] therefore [1] 
output: given these facts
options: a s a r e s u l t
options: i n b r i e f
options: g e n e r a l l y
options: g i v e n t h e s e f a c t s
options: a c c o r d i n g l y
options: c o n v e r s e l y
options: n o t w i t h s t a n d i n g
options: f o r t h i s r e a s o n