It's possible to find substitution rule without bruteforce and AI? How “simple” is this substitution rule?

I have several guesses (one replaces the other) how to find out starting position:
1. URU (first 3 letters) and 5ef (last 3 letters) are indicate the position of the silvercard and maybe what exact black card use (as you write before). But if it so, then first and last line have only 3 letter for word. One of them can be "cat", but what can be second word from what ciphered 3 letters instead of 5, if that guess is right...
2. Two last symbols in first row (Yw) are indicate the position of the silvercard that can mean "w=Y". But if this guess right, it can't be used for S2, cause I can't see where "3=5"

Also in 7 and 8 row we can see 3 same letters in same order. If for each row used same substitution rule - it's strange. Cause we haven't 2 words that have 3 same letteres in the same positions, except "cat" and "cattle", but 7 and 8 row chipered "cat" and "cattle" why second "t" from "cattle" is presented like "J" or "5", if substitution rule is same for each row  ... And also if I right that 7 and 8 row contains this words that mean that first letter from row is show us position