Question

they read the letter and go to opposite direction

Answer 1

Answer:

what is the question write the question completely

Explanation:

what the question says what we have to solve?

Answer 2

hey thats a kind of riddle

the answer is "U"

when they see this symbol , they may turn and travel in opposite direction

or the another chance is "X"

which means prohibited area , where you should turn in opposite direction