Pattern involves variable jumps: E (5) to K (11) is +6, K (11) to P (16) is +5, P (16) to T (20) is +4, T (20) to W (23) is +3, W (23) to Y (25) is +2, Y (25) to Z (26) is +1. The jump decreases by 1 each time: +6, +5, +4, +3, +2, +1. Starting from E, the first jump is +6 to K.