The cyueteyl is the extra mark made on a capital Q to stop it being an O, or the line on a lower case q to prevent it being a reversed p, upside-down b, or reversed upside-down d. It also stops the Q or q from looking like an incorrectly written Z : (i.e. one written like an O)(or a reversed upside-down d). The cyueteyl, pronounced as its rather obvious derivation (Q-tail) suggests, is a fundamental part of the English language when written. A curse falls on all those misusing it, or even worse, forgetting it. They themselves shall grow cyueteyls, and thereby be laughed at by all who see them, making those sinners so embarrassed they all explode with a bang and a puff of smoke.