Hard
Study the code: CLOUD=durxs, MOON=wxxv, SKY=tbh, STAR=pcba, SUN=bwd. What is the code letter of 'O'?
Explanation
Explanation
In MOON, the letter O repeats twice, and correspondingly the code 'wxxv' has 'x' repeating twice in the same relative position, so O is coded as 'x'.
PRO TIP
Re-check your working by substituting the answer back into the original question.