" i 'm not sure , " i said . " i 'm not sure if i can do it . " 
 " you can , " he said . " you can do it . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know if i can . " 
 " you can . " 
 " i do n't know
