$ OUT=$(smenu -n 10 -l t0001.in)

1 2 3 4 5 

6 7 8 9 10 

11 12 13 14 15 
9:07 10:07 
16 17 18 19 20 

21 22 23 24 25 

26 27 28 29 30 

$ 

$ echo ":$OUT:"

:14:

$ exit 0