| http://www.w3.org/ns/prov#value | - A system for assigning keys on a keypad according to claim 11, wherein the standard numeric keypad has 12 keys, and the 26-letter English alphabet is assigned to the 12 keys in the first character mode in one of the following ways: 24 letters assigned in pairs to the 12 keys, except for two letters, and the two excepted letters assigned to two keys in a second, optional character mode; 26 letters
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