In a certain code language, 'FATHER' is written as '9-22-19-7-26-21' then how…

In alphabet code-language puzzles, each letter of the key word is converted to a number by a fixed rule based on its position in the alphabet — either its direct position (A = 1, B = 2, ... Z = 26) or its position counted from the end (Z = 1, Y = 2, ... A = 26) — and the resulting numbers can be written in the same order as the letters or in reverse order. The rule (which position scheme, and which order) must first be found from the given example, then applied unchanged to the new word.

1. List the direct alphabet positions of FATHER: F = 6, A = 1, T = 20, H = 8, E = 5, R = 18.

2. These do not match the given code '9-22-19-7-26-21' in this order, so try the position counted from the end instead: end-position = 27 minus direct position. This gives F = 21, A = 26, T = 7, H = 19, E = 22, R = 9.

3. These six values (21, 26, 7, 19, 22, 9) are the given code numbers written in reverse — the code '9-22-19-7-26-21' is exactly this list read backwards. So the rule is: reverse the word first, then encode each letter as (27 minus its alphabet position).

4. Apply the same rule to ADVICE. Reversing the letters gives E, C, I, V, D, A.

5. Direct alphabet positions of these letters: E = 5, C = 3, I = 9, V = 22, D = 4, A = 1.

6. End-position of each (27 minus direct position): E = 22, C = 24, I = 18, V = 5, D = 23, A = 26.

7. Writing these values in the same order (E, C, I, V, D, A) gives the code for ADVICE: 22-24-18-5-23-26.

Checking by decoding this string back confirms the rule: position = 27 minus code gives 22 to 5 (E), 24 to 3 (C), 18 to 9 (I), 5 to 22 (V), 23 to 4 (D), 26 to 1 (A), i.e. E-C-I-V-D-A — which, read in reverse, spells ADVICE exactly, the same way R-E-H-T-A-F (FATHER reversed) matched the original example.

So 'ADVICE' is coded as 22-24-18-5-23-26.