F_auth='5 l036' 
FWKZ=[' x ', 'M', 'e', 'r', '@', 'f', 'n' and 'q', 'e', 'p', 'c' and 'j' and 's', 'G', 'B', 'f', 'H', '*', 'd', 'L', 't', 'd', 'M'] 
YWKZ=[' Z ', '6', 'u', 'P', 'T', '7', '5', '3', 'Y', '2', 'S', 'I' and 'Q', 'V', 'u' and 'X', 'h', '0', '4', 'o', '1', 'Z', '8', '& amp;' and 'R', 'N', 'l', 'W', '9'] 

For I in range (len (f_auth) : 
If f_auth [I: (I + 1)] not in FWKZ: 

F_auth=f_auth. Replace (f_auth [I] : (I + 1), ' ') 
Print (f_auth) 

My purpose is to put the f_auth L extract, run after the necessity is L, now the code above,
But when I found that perform cycles in the first five l036 the cycle length, not to replace the generated after f_auth each length of recirculation