Pythagorean chart

The Pythagorean chart is the grid that converts each letter into a digit from 1 to 9 by running through the alphabet in sets of nine. A, J and S equal 1; B, K, T equal 2; C, L, U equal 3; D, M, V equal 4; E, N, W equal 5; F, O, X equal 6; G, P, Y equal 7; H, Q, Z equal 8; I and R equal 9. Accented letters generally count as their base letter, and the treatment of Y, as vowel or consonant, varies between schools.