The simplicity and ease with which you will be able to use this idea
can be increased by noting that there are certain letters which have
practically the same sound as those selected to represent the digits.
Yet these sounds are entirely different from any other digit sound. You
can greatly increase the list of words which you can make for certain
numbers by taking advantage of this idea. This is a very helpful
suggestion; note it carefully.
All letters having the same sound stand for the same digit value:
D and T are similar in sound and therefore either can be used to
represent the digit 1.
G as in George (known as soft G) has the same sound as J, therefore
soft G also represents 6.
Sh as in Shot, and Ch as in Chain are similar to J in sound so Sh or Ch
represent 6.