Alphabet - Bonus

"ONE THREE DOUBLE-OH SIX TRIPLE-FIVE OH SIX" is a terrible jingle to advertise the phone number for a reading writing help-line. 

I normally would'nt write another post in the bonus panel, but to continue on from the caption, if you're using an alpha-numeric keypad (think old brick phones) rather than a QWERTY keyboard, then you'd want to make sure you know the difference between "OH" and "ZERO", otherwise you're gonna be calling the devil instead of an ambulance.