import string

str = "xe7xbdxaaxe6x81xb6xe7x8ex8bxe5x86xa0/xe7x94xb2xe9x93x81xe5x9fx8exefxbcx88xe5xbex90xe6xa2xa6xe5x9cx86Remixxefxbcx89"
res = ""
for i, ch in enumerate(str):
    if ch =='x' and len(str) > i+2 and all(c in string.hexdigits for c in str[i+1: i+3]):
        res += "\\x"
    else:
        res += ch

print(res)