···Python
sentence=input("Sentence:")
screen_width=80
text_width=len(sentence)
box_width=text_width+10
blank_width=(box_width-text_width)//2
left_width=(screen_width-text_width)//2
print(r'The sentence you input is in the box!')
print(' '*left_width+'+'+'-'*(box_width-2)+'+')
print(' '*left_width+'|'+' '*(box_width-2)+'|')
print(' '*left_width+'|'+' '*blank_width+sentence+' '*(box_width-text_width-blank_width-2)+'|')
print(' '*left_width+'|'+' '*(box_width-2)+'|')
print(' '*left_width+'+'+'-'*(box_width-2)+'+')
```
