Well, lets continue with finding xor

 

Again, we have strings encoded to hex, after decoding we get:

"KSSP"(longer string actually) 
"hit the bull's eye"

Second string is sane and xored with arbitrary bits of first string we get result:

"the kid don't play", which is same size like second input, since no control characters, sane symbols only)

Here is challenge, here is solution.