Mryw - Srt H-hym Swpr

mryw: m (13) ↔ n (14) r (18) ↔ i (9) y (25) ↔ b (2) w (23) ↔ d (4) →

swpr: s (19) ↔ h (8) w (23) ↔ d (4) p (16) ↔ k (11) r (18) ↔ i (9) → srt h-hym swpr mryw

So — still obscure. Alternatively, treating it as a simple shift cipher (ROT-N) . Trying ROT13 (common in online puzzles): mryw: m (13) ↔ n (14) r (18)

s (19) ↔ h (8) r (18) ↔ i (9) t (20) ↔ g (7) → srt h-hym swpr mryw