Someone encoded a message written in English using a shift c

Someone encoded a message written in English using a shift cipher. The encoded message is LORYH FRPSX WHUV. The spaces between the words were decided randomly. Decode the message. Justify your answer. [Hint: You will need to guess the key, and can try one at a time (from 0 to 25).]

Solution

Use a shift of 23 and the message becomes

ILOVE COMPU TERS

I noticed that the most frequent letters in the encoded message were R and H. I decided to try to let E be each of these letters and see where the code took me.