Rearrange the parts to make a meaningful sentence.

P. your letters in a box

Q. made for me

R. I have kept all

S. that my grandfather

Explanation

1. 01

   R ends on "all", which needs a noun: P "your letters in a box".

2. 02

   S begins a clause about the box, and "my grandfather" needs a verb: Q "made for me".

3. 03

   So the order is RPSQ: "I have kept all your letters in a box that my grandfather made for me."