6. The computer-implemented method of claim 1 , further comprising: receiving an indication of a selection of one of the numerical values of the second set of numerical values; and modifying the one of the modifiable characters responsive to the selection.
6. The computer-implemented method of claim 1 , further comprising: receiving an indication of a selection of one of the numerical values of the second set of numerical values; and modifying the one of the modifiable characters responsive to the selection. 7. The computer-implemented method of claim 6 , wherein modifying the one of the modifiable characters causes the one of the modifiable characters to be changed to a different character.