A | B | C 
                | D | E | F | 
                G | H | I | J 
                | K | L | M | 
                N | O | P | Q 
                | R | S | T | 
                U | V | W | X 
                | Y | Z
            X - common mark used by one who cannot sign his/her name. The signature is as valid as a signed name unless restricted by statute. 
            X-BRACING - Crossbracing forming the letter X. Used in floors and partitions.